120657725257 has 4 divisors (see below), whose sum is σ = 122458586896. Its totient is φ = 118856863620.

The previous prime is 120657725203. The next prime is 120657725291. The reversal of 120657725257 is 752527756021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120657725257 - 2¹⁹ = 120657200969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120657725257.

It is not an unprimeable number, because it can be changed into a prime (120657725057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900430719 + ... + 900430852.

It is an arithmetic number, because the mean of its divisors is an integer number (30614646724).

Almost surely, 2^120657725257 is an apocalyptic number.

It is an amenable number.

120657725257 is a deficient number, since it is larger than the sum of its proper divisors (1800861639).

120657725257 is an equidigital number, since it uses as much as digits as its factorization.

120657725257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800861638.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The spelling of 120657725257 in words is "one hundred twenty billion, six hundred fifty-seven million, seven hundred twenty-five thousand, two hundred fifty-seven".