165601115001515 has 16 divisors (see below), whose sum is σ = 201041580877920. Its totient is φ = 130938673939200.

The previous prime is 165601115001499. The next prime is 165601115001527. The reversal of 165601115001515 is 515100511106561.

It is not a de Polignac number, because 165601115001515 - 2⁴ = 165601115001499 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287869949 + ... + 288444638.

It is an arithmetic number, because the mean of its divisors is an integer number (12565098804870).

Almost surely, 2^{165601115001515} is an apocalyptic number.

165601115001515 is a deficient number, since it is larger than the sum of its proper divisors (35440465876405).

165601115001515 is a wasteful number, since it uses less digits than its factorization.

165601115001515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576315262.

The product of its (nonzero) digits is 22500, while the sum is 38.

The spelling of 165601115001515 in words is "one hundred sixty-five trillion, six hundred one billion, one hundred fifteen million, one thousand, five hundred fifteen".