690864931705 has 32 divisors (see below), whose sum is σ = 939886416000. Its totient is φ = 483281344512.

The previous prime is 690864931657. The next prime is 690864931733. The reversal of 690864931705 is 507139468096.

It is a cyclic number.

It is not a de Polignac number, because 690864931705 - 2²⁵ = 690831377273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690864931705.

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, 19308642 + ... + 19344388.

It is an arithmetic number, because the mean of its divisors is an integer number (29371450500).

Almost surely, 2^690864931705 is an apocalyptic number.

690864931705 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

690864931705 is a deficient number, since it is larger than the sum of its proper divisors (249021484295).

690864931705 is a wasteful number, since it uses less digits than its factorization.

690864931705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51433.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 690864931705 in words is "six hundred ninety billion, eight hundred sixty-four million, nine hundred thirty-one thousand, seven hundred five".