7221174412644 has 96 divisors (see below), whose sum is σ = 19036211604480. Its totient is φ = 2366635449600.

The previous prime is 7221174412643. The next prime is 7221174412687. The reversal of 7221174412644 is 4462144711227.

7221174412644 is a `hidden beast` number, since 7 + 2 + 2 + 1 + 174 + 412 + 64 + 4 = 666.

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 7221174412644.

It is not an unprimeable number, because it can be changed into a prime (7221174412643) 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 31 ways as a sum of consecutive naturals, for example, 16070509 + ... + 16513739.

It is an arithmetic number, because the mean of its divisors is an integer number (198293870880).

Almost surely, 2^{7221174412644} 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 7221174412644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9518105802240).

7221174412644 is an abundant number, since it is smaller than the sum of its proper divisors (11815037191836).

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

7221174412644 is a wasteful number, since it uses less digits than its factorization.

7221174412644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445778 (or 445770 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The spelling of 7221174412644 in words is "seven trillion, two hundred twenty-one billion, one hundred seventy-four million, four hundred twelve thousand, six hundred forty-four".