15497760099 has 16 divisors (see below), whose sum is σ = 21888329760. Its totient is φ = 9720023040.

The previous prime is 15497760073. The next prime is 15497760107. The reversal of 15497760099 is 99006779451.

It is a Cunningham number, because it is equal to 124490²-1.

It is not a de Polignac number, because 15497760099 - 2²⁰ = 15496711523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15497760029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62247 + ... + 186735.

It is an arithmetic number, because the mean of its divisors is an integer number (1368020610).

Almost surely, 2^15497760099 is an apocalyptic number.

15497760099 is a deficient number, since it is larger than the sum of its proper divisors (6390569661).

15497760099 is a wasteful number, since it uses less digits than its factorization.

15497760099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126950.

The product of its (nonzero) digits is 4286520, while the sum is 57.

The spelling of 15497760099 in words is "fifteen billion, four hundred ninety-seven million, seven hundred sixty thousand, ninety-nine".