120979945565 has 32 divisors (see below), whose sum is σ = 149780606976. Its totient is φ = 93761064000.

The previous prime is 120979945553. The next prime is 120979945571. The reversal of 120979945565 is 565549979021.

It is not a de Polignac number, because 120979945565 - 2⁴ = 120979945549 is a prime.

It is a super-2 number, since 2×120979945565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120979945498 and 120979945507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9608264 + ... + 9620846.

It is an arithmetic number, because the mean of its divisors is an integer number (4680643968).

Almost surely, 2^120979945565 is an apocalyptic number.

It is an amenable number.

120979945565 is a deficient number, since it is larger than the sum of its proper divisors (28800661411).

120979945565 is a wasteful number, since it uses less digits than its factorization.

120979945565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13049.

The product of its (nonzero) digits is 30618000, while the sum is 62.

The spelling of 120979945565 in words is "one hundred twenty billion, nine hundred seventy-nine million, nine hundred forty-five thousand, five hundred sixty-five".