690564407338 has 16 divisors (see below), whose sum is σ = 1115559726120. Its totient is φ = 318712718016.

The previous prime is 690564407333. The next prime is 690564407339. The reversal of 690564407338 is 833704465096.

It can be written as a sum of positive squares in 4 ways, for example, as 521591617369 + 168972789969 = 722213^2 + 411063^2 .

It is not an unprimeable number, because it can be changed into a prime (690564407333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562356 + ... + 1302832.

Almost surely, 2^690564407338 is an apocalyptic number.

690564407338 is a deficient number, since it is larger than the sum of its proper divisors (424995318782).

690564407338 is a wasteful number, since it uses less digits than its factorization.

690564407338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776361.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 690564407338 in words is "six hundred ninety billion, five hundred sixty-four million, four hundred seven thousand, three hundred thirty-eight".