690626500257 has 16 divisors (see below), whose sum is σ = 926962239168. Its totient is φ = 457361203200.

The previous prime is 690626500229. The next prime is 690626500313. The reversal of 690626500257 is 752005626096.

It is not a de Polignac number, because 690626500257 - 2⁸ = 690626500001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690626507257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477744 + ... + 1268657.

It is an arithmetic number, because the mean of its divisors is an integer number (57935139948).

Almost surely, 2^690626500257 is an apocalyptic number.

It is an amenable number.

690626500257 is a deficient number, since it is larger than the sum of its proper divisors (236335738911).

690626500257 is a wasteful number, since it uses less digits than its factorization.

690626500257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747280.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 690626500257 in words is "six hundred ninety billion, six hundred twenty-six million, five hundred thousand, two hundred fifty-seven".