871624977912921 has 32 divisors (see below), whose sum is σ = 1228508483392512. Its totient is φ = 548584382617920.

The previous prime is 871624977912919. The next prime is 871624977912977. The reversal of 871624977912921 is 129219779426178.

It is not a de Polignac number, because 871624977912921 - 2¹ = 871624977912919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (871624977914921) 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 31 ways as a sum of consecutive naturals, for example, 68685415 + ... + 80379948.

It is an arithmetic number, because the mean of its divisors is an integer number (38390890106016).

Almost surely, 2^{871624977912921} is an apocalyptic number.

It is an amenable number.

871624977912921 is a deficient number, since it is larger than the sum of its proper divisors (356883505479591).

871624977912921 is a wasteful number, since it uses less digits than its factorization.

871624977912921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149066493.

The product of its digits is 384072192, while the sum is 75.

The spelling of 871624977912921 in words is "eight hundred seventy-one trillion, six hundred twenty-four billion, nine hundred seventy-seven million, nine hundred twelve thousand, nine hundred twenty-one".