99400505004 has 18 divisors (see below), whose sum is σ = 251262387740. Its totient is φ = 33133501656.

The previous prime is 99400505003. The next prime is 99400505053. The reversal of 99400505004 is 40050500499.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2761125139 = 99400505004 / (9 + 9 + 4 + 0 + 0 + 5 + 0 + 5 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 99400505004.

It is not an unprimeable number, because it can be changed into a prime (99400505003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1380562534 + ... + 1380562605.

Almost surely, 2^99400505004 is an apocalyptic number.

It is an amenable number.

99400505004 is an abundant number, since it is smaller than the sum of its proper divisors (151861882736).

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

99400505004 is a wasteful number, since it uses less digits than its factorization.

99400505004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761125149 (or 2761125144 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 99400505004 in words is "ninety-nine billion, four hundred million, five hundred five thousand, four".