490616635257 has 120 divisors (see below), whose sum is σ = 880560722496. Its totient is φ = 272763269856.

The previous prime is 490616635231. The next prime is 490616635279. The reversal of 490616635257 is 752536616094.

490616635257 is a `hidden beast` number, since 49 + 0 + 6 + 16 + 63 + 525 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-490616635257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (490616633257) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 21576028 + ... + 21598754.

Almost surely, 2^490616635257 is an apocalyptic number.

It is an amenable number.

490616635257 is a deficient number, since it is larger than the sum of its proper divisors (389944087239).

490616635257 is an frugal number, since it uses more digits than its factorization.

490616635257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22807 (or 22774 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 490616635257 in words is "four hundred ninety billion, six hundred sixteen million, six hundred thirty-five thousand, two hundred fifty-seven".