10520315640 has 112 divisors (see below), whose sum is σ = 35489928600. Its totient is φ = 2805409728.

The previous prime is 10520315633. The next prime is 10520315693. The reversal of 10520315640 is 4651302501.

10520315640 is a `hidden beast` number, since 1 + 0 + 5 + 2 + 0 + 3 + 15 + 640 = 666.

It is a super-2 number, since 2×10520315640² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 151230 + ... + 209549.

Almost surely, 2^10520315640 is an apocalyptic number.

10520315640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10520315640 is an abundant number, since it is smaller than the sum of its proper divisors (24969612960).

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

10520315640 is an equidigital number, since it uses as much as digits as its factorization.

10520315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360808 (or 360789 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 10520315640 in words is "ten billion, five hundred twenty million, three hundred fifteen thousand, six hundred forty".