999875106261 has 32 divisors (see below), whose sum is σ = 1545817328640. Its totient is φ = 637553386800.

The previous prime is 999875106239. The next prime is 999875106271. The reversal of 999875106261 is 162601578999.

999875106261 is a `hidden beast` number, since 9 + 9 + 98 + 7 + 510 + 6 + 26 + 1 = 666.

It is not a de Polignac number, because 999875106261 - 2⁷ = 999875106133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999875106271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9343146 + ... + 9449556.

It is an arithmetic number, because the mean of its divisors is an integer number (48306791520).

Almost surely, 2^999875106261 is an apocalyptic number.

It is an amenable number.

999875106261 is a deficient number, since it is larger than the sum of its proper divisors (545942222379).

999875106261 is a wasteful number, since it uses less digits than its factorization.

999875106261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121574 (or 121568 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 63.

The spelling of 999875106261 in words is "nine hundred ninety-nine billion, eight hundred seventy-five million, one hundred six thousand, two hundred sixty-one".