99719045538 has 48 divisors (see below), whose sum is σ = 232089325920. Its totient is φ = 28480113984.

The previous prime is 99719045513. The next prime is 99719045551. The reversal of 99719045538 is 83554091799.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 709693 + ... + 838511.

It is an arithmetic number, because the mean of its divisors is an integer number (4835194290).

Almost surely, 2^99719045538 is an apocalyptic number.

99719045538 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

99719045538 is an abundant number, since it is smaller than the sum of its proper divisors (132370280382).

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

99719045538 is a wasteful number, since it uses less digits than its factorization.

99719045538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131471 (or 131464 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 60.

It can be divided in two parts, 9971 and 9045538, that added together give a palindrome (9055509).

The spelling of 99719045538 in words is "ninety-nine billion, seven hundred nineteen million, forty-five thousand, five hundred thirty-eight".