1220045245461 has 48 divisors (see below), whose sum is σ = 2091798869888. Its totient is φ = 696113352000.

The previous prime is 1220045245459. The next prime is 1220045245493. The reversal of 1220045245461 is 1645425400221.

1220045245461 is a `hidden beast` number, since 1 + 2 + 20 + 0 + 4 + 524 + 54 + 61 = 666.

It is not a de Polignac number, because 1220045245461 - 2¹ = 1220045245459 is a prime.

It is a super-2 number, since 2×1220045245461² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220045245411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 581811 + ... + 1666911.

Almost surely, 2^{1220045245461} is an apocalyptic number.

It is an amenable number.

1220045245461 is a deficient number, since it is larger than the sum of its proper divisors (871753624427).

1220045245461 is an equidigital number, since it uses as much as digits as its factorization.

1220045245461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085784 (or 1085772 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 1220045245461 in words is "one trillion, two hundred twenty billion, forty-five million, two hundred forty-five thousand, four hundred sixty-one".