13263646640520 has 64 divisors (see below), whose sum is σ = 40201155832320. Its totient is φ = 3500508801024.

The previous prime is 13263646640507. The next prime is 13263646640551. The reversal of 13263646640520 is 2504664636231.

It is a self number, because there is not a number n which added to its sum of digits gives 13263646640520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569732632 + ... + 569755911.

It is an arithmetic number, because the mean of its divisors is an integer number (628143059880).

Almost surely, 2^{13263646640520} is an apocalyptic number.

13263646640520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13263646640520 is an abundant number, since it is smaller than the sum of its proper divisors (26937509191800).

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

13263646640520 is a wasteful number, since it uses less digits than its factorization.

13263646640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139488654 (or 1139488650 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 13263646640520 in words is "thirteen trillion, two hundred sixty-three billion, six hundred forty-six million, six hundred forty thousand, five hundred twenty".