99939769072144 has 15 divisors (see below), whose sum is σ = 193633380053967. Its totient is φ = 49969864542096.

The previous prime is 99939769072037. The next prime is 99939769072211. The reversal of 99939769072144 is 44127096793999.

The square root of 99939769072144 is 9996988.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 38738329 + ... + 41237575.

Almost surely, 2^{99939769072144} is an apocalyptic number.

99939769072144 is the 9996988-th square number.

It is an amenable number.

99939769072144 is a deficient number, since it is larger than the sum of its proper divisors (93693610981823).

99939769072144 is an frugal number, since it uses more digits than its factorization.

99939769072144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998502 (or 2499249 counting only the distinct ones).

The product of its (nonzero) digits is 1666598976, while the sum is 79.

The spelling of 99939769072144 in words is "ninety-nine trillion, nine hundred thirty-nine billion, seven hundred sixty-nine million, seventy-two thousand, one hundred forty-four".