99985921284 has 48 divisors (see below), whose sum is σ = 234452365056. Its totient is φ = 33164340000.

The previous prime is 99985921283. The next prime is 99985921303. The reversal of 99985921284 is 48212958999.

It is not an unprimeable number, because it can be changed into a prime (99985921283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3270879 + ... + 3301305.

It is an arithmetic number, because the mean of its divisors is an integer number (4884424272).

Almost surely, 2^99985921284 is an apocalyptic number.

It is an amenable number.

99985921284 is an abundant number, since it is smaller than the sum of its proper divisors (134466443772).

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

99985921284 is a wasteful number, since it uses less digits than its factorization.

99985921284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31776 (or 31774 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 66.

The spelling of 99985921284 in words is "ninety-nine billion, nine hundred eighty-five million, nine hundred twenty-one thousand, two hundred eighty-four".