999874757880 has 128 divisors (see below), whose sum is σ = 3477825331200. Its totient is φ = 255040511616.

The previous prime is 999874757813. The next prime is 999874757881. The reversal of 999874757880 is 88757478999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 999874757880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999874757881) 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 31 ways as a sum of consecutive naturals, for example, 20101464 + ... + 20151143.

It is an arithmetic number, because the mean of its divisors is an integer number (27170510400).

Almost surely, 2^999874757880 is an apocalyptic number.

999874757880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

999874757880 is an abundant number, since it is smaller than the sum of its proper divisors (2477950573320).

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

999874757880 is a wasteful number, since it uses less digits than its factorization.

999874757880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40252650 (or 40252640 counting only the distinct ones).

The product of its (nonzero) digits is 2560481280, while the sum is 81.

The spelling of 999874757880 in words is "nine hundred ninety-nine billion, eight hundred seventy-four million, seven hundred fifty-seven thousand, eight hundred eighty".