99900445544 has 32 divisors (see below), whose sum is σ = 188175312000. Its totient is φ = 49720538112.

The previous prime is 99900445501. The next prime is 99900445573. The reversal of 99900445544 is 44554400999.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5254247 + ... + 5273225.

It is an arithmetic number, because the mean of its divisors is an integer number (5880478500).

Almost surely, 2^99900445544 is an apocalyptic number.

It is an amenable number.

99900445544 is a deficient number, since it is larger than the sum of its proper divisors (88274866456).

99900445544 is a wasteful number, since it uses less digits than its factorization.

99900445544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21977 (or 21973 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 99900445544 in words is "ninety-nine billion, nine hundred million, four hundred forty-five thousand, five hundred forty-four".