523165640 has 16 divisors (see below), whose sum is σ = 1177122780. Its totient is φ = 209266240.

The previous prime is 523165637. The next prime is 523165651. The reversal of 523165640 is 46561325.

It can be written as a sum of positive squares in 2 ways, for example, as 494884516 + 28281124 = 22246^2 + 5318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 523165597 and 523165606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6539531 + ... + 6539610.

Almost surely, 2^523165640 is an apocalyptic number.

It is an amenable number.

523165640 is an abundant number, since it is smaller than the sum of its proper divisors (653957140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523165640 is a wasteful number, since it uses less digits than its factorization.

523165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13079152 (or 13079148 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 523165640 is about 22872.8144311101. The cubic root of 523165640 is about 805.7736682013.

The spelling of 523165640 in words is "five hundred twenty-three million, one hundred sixty-five thousand, six hundred forty".