13520557401808 has 20 divisors (see below), whose sum is σ = 26402348316160. Its totient is φ = 6707048158944.

The previous prime is 13520557401739. The next prime is 13520557401821. The reversal of 13520557401808 is 80810475502531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3326906778 + ... + 3326910841.

It is an arithmetic number, because the mean of its divisors is an integer number (1320117415808).

Almost surely, 2^{13520557401808} is an apocalyptic number.

It is an amenable number.

13520557401808 is a deficient number, since it is larger than the sum of its proper divisors (12881790914352).

13520557401808 is a wasteful number, since it uses less digits than its factorization.

13520557401808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653817754 (or 6653817748 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 13520557401808 in words is "thirteen trillion, five hundred twenty billion, five hundred fifty-seven million, four hundred one thousand, eight hundred eight".