13156037634881 has 4 divisors (see below), whose sum is σ = 13283766155712. Its totient is φ = 13028309114052.

The previous prime is 13156037634871. The next prime is 13156037634931. The reversal of 13156037634881 is 18843673065131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13156037634881 - 2²² = 13156033440577 is a prime.

It is a super-2 number, since 2×13156037634881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13156037634821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63864260261 + ... + 63864260466.

It is an arithmetic number, because the mean of its divisors is an integer number (3320941538928).

Almost surely, 2^{13156037634881} is an apocalyptic number.

It is an amenable number.

13156037634881 is a deficient number, since it is larger than the sum of its proper divisors (127728520831).

13156037634881 is a wasteful number, since it uses less digits than its factorization.

13156037634881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127728520830.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 13156037634881 in words is "thirteen trillion, one hundred fifty-six billion, thirty-seven million, six hundred thirty-four thousand, eight hundred eighty-one".