869137809012 has 36 divisors (see below), whose sum is σ = 2396713353216. Its totient is φ = 263375093520.

The previous prime is 869137808989. The next prime is 869137809013. The reversal of 869137809012 is 210908731968.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×869137809012² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 869137809012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869137809013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1097395828 + ... + 1097396619.

Almost surely, 2^869137809012 is an apocalyptic number.

It is an amenable number.

869137809012 is an abundant number, since it is smaller than the sum of its proper divisors (1527575544204).

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

869137809012 is a wasteful number, since it uses less digits than its factorization.

869137809012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194792468 (or 2194792463 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 869137809012 in words is "eight hundred sixty-nine billion, one hundred thirty-seven million, eight hundred nine thousand, twelve".