120656619657 has 288 divisors, whose sum is σ = 230784153600. Its totient is φ = 62590050432.

The previous prime is 120656619649. The next prime is 120656619659. The reversal of 120656619657 is 756916656021.

120656619657 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 566 + 19 + 65 + 7 = 666.

It is not a de Polignac number, because 120656619657 - 2³ = 120656619649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120656619659) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 768513423 + ... + 768513579.

Almost surely, 2^120656619657 is an apocalyptic number.

It is an amenable number.

120656619657 is a deficient number, since it is larger than the sum of its proper divisors (110127533943).

120656619657 is a wasteful number, since it uses less digits than its factorization.

120656619657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 120656619657 in words is "one hundred twenty billion, six hundred fifty-six million, six hundred nineteen thousand, six hundred fifty-seven".