99540471625 has 64 divisors (see below), whose sum is σ = 145734451200. Its totient is φ = 66462897600.

The previous prime is 99540471619. The next prime is 99540471643. The reversal of 99540471625 is 52617404599.

It is not a de Polignac number, because 99540471625 - 2¹⁹ = 99539947337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8177794 + ... + 8189956.

It is an arithmetic number, because the mean of its divisors is an integer number (2277100800).

Almost surely, 2^99540471625 is an apocalyptic number.

It is an amenable number.

99540471625 is a deficient number, since it is larger than the sum of its proper divisors (46193979575).

99540471625 is a wasteful number, since it uses less digits than its factorization.

99540471625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431 (or 12421 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 99540471625 in words is "ninety-nine billion, five hundred forty million, four hundred seventy-one thousand, six hundred twenty-five".