99072418644 has 36 divisors (see below), whose sum is σ = 265164416244. Its totient is φ = 31081542912.

The previous prime is 99072418639. The next prime is 99072418651. The reversal of 99072418644 is 44681427099.

It can be written as a sum of positive squares in 2 ways, for example, as 85907610000 + 13164808644 = 293100^2 + 114738^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80940907 + ... + 80942130.

It is an arithmetic number, because the mean of its divisors is an integer number (7365678229).

Almost surely, 2^99072418644 is an apocalyptic number.

It is an amenable number.

99072418644 is an abundant number, since it is smaller than the sum of its proper divisors (166091997600).

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

99072418644 is a wasteful number, since it uses less digits than its factorization.

99072418644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161883064 (or 161883059 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 99072418644 in words is "ninety-nine billion, seventy-two million, four hundred eighteen thousand, six hundred forty-four".