869892126921 has 64 divisors (see below), whose sum is σ = 1371500605440. Its totient is φ = 543036130560.

The previous prime is 869892126833. The next prime is 869892126959. The reversal of 869892126921 is 129621298968.

It is not a de Polignac number, because 869892126921 - 2¹⁰ = 869892125897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (869892126421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76414596 + ... + 76425978.

It is an arithmetic number, because the mean of its divisors is an integer number (21429696960).

Almost surely, 2^869892126921 is an apocalyptic number.

It is an amenable number.

869892126921 is a deficient number, since it is larger than the sum of its proper divisors (501608478519).

869892126921 is a wasteful number, since it uses less digits than its factorization.

869892126921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243 (or 12237 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The spelling of 869892126921 in words is "eight hundred sixty-nine billion, eight hundred ninety-two million, one hundred twenty-six thousand, nine hundred twenty-one".