99657571944 has 64 divisors (see below), whose sum is σ = 286909539840. Its totient is φ = 28256230080.

The previous prime is 99657571943. The next prime is 99657572039. The reversal of 99657571944 is 44917575699.

It is not an unprimeable number, because it can be changed into a prime (99657571943) 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 15 ways as a sum of consecutive naturals, for example, 2242114 + ... + 2286129.

It is an arithmetic number, because the mean of its divisors is an integer number (4482961560).

Almost surely, 2^99657571944 is an apocalyptic number.

It is an amenable number.

99657571944 is an abundant number, since it is smaller than the sum of its proper divisors (187251967896).

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

99657571944 is a wasteful number, since it uses less digits than its factorization.

99657571944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528390 (or 4528386 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 66.

The spelling of 99657571944 in words is "ninety-nine billion, six hundred fifty-seven million, five hundred seventy-one thousand, nine hundred forty-four".