1220462536644 has 120 divisors (see below), whose sum is σ = 3441917262168. Its totient is φ = 374875361280.

The previous prime is 1220462536621. The next prime is 1220462536649. The reversal of 1220462536644 is 4466352640221.

It is a happy number.

1220462536644 is a `hidden beast` number, since 1 + 220 + 4 + 6 + 25 + 366 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 231253268544 + 989209268100 = 480888^2 + 994590^2 .

It is a super-3 number, since 3×1220462536644³ (a number of 37 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1220462536644.

It is not an unprimeable number, because it can be changed into a prime (1220462536649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2179234 + ... + 2681414.

Almost surely, 2^{1220462536644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220462536644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720958631084).

1220462536644 is an abundant number, since it is smaller than the sum of its proper divisors (2221454725524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220462536644 is a wasteful number, since it uses less digits than its factorization.

1220462536644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502787 (or 502776 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 1220462536644 in words is "one trillion, two hundred twenty billion, four hundred sixty-two million, five hundred thirty-six thousand, six hundred forty-four".