13261552145520 has 80 divisors (see below), whose sum is σ = 46983784750080. Its totient is φ = 3031211918592.

The previous prime is 13261552145411. The next prime is 13261552145563. The reversal of 13261552145520 is 2554125516231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13261552145520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3946888840 + ... + 3946892199.

It is an arithmetic number, because the mean of its divisors is an integer number (587297309376).

Almost surely, 2^{13261552145520} is an apocalyptic number.

13261552145520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13261552145520 is an abundant number, since it is smaller than the sum of its proper divisors (33722232604560).

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

13261552145520 is a wasteful number, since it uses less digits than its factorization.

13261552145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893781062 (or 7893781056 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 13261552145520 in words is "thirteen trillion, two hundred sixty-one billion, five hundred fifty-two million, one hundred forty-five thousand, five hundred twenty".