99581134644 has 48 divisors (see below), whose sum is σ = 261360659840. Its totient is φ = 33193708632.

The previous prime is 99581134633. The next prime is 99581134657. The reversal of 99581134644 is 44643118599.

99581134644 is a `hidden beast` number, since 9 + 9 + 581 + 13 + 4 + 6 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5682904 + ... + 5700399.

Almost surely, 2^99581134644 is an apocalyptic number.

It is an amenable number.

99581134644 is an abundant number, since it is smaller than the sum of its proper divisors (161779525196).

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

99581134644 is a wasteful number, since it uses less digits than its factorization.

99581134644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383328 (or 11383308 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 99581134644 in words is "ninety-nine billion, five hundred eighty-one million, one hundred thirty-four thousand, six hundred forty-four".