161503161575 has 24 divisors (see below), whose sum is σ = 242336176992. Its totient is φ = 104230609920.

The previous prime is 161503161563. The next prime is 161503161601. The reversal of 161503161575 is 575161305161.

It is not a de Polignac number, because 161503161575 - 2⁸ = 161503161319 is a prime.

It is a congruent 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, 27140414 + ... + 27146363.

It is an arithmetic number, because the mean of its divisors is an integer number (10097340708).

Almost surely, 2^161503161575 is an apocalyptic number.

161503161575 is a deficient number, since it is larger than the sum of its proper divisors (80833015417).

161503161575 is a wasteful number, since it uses less digits than its factorization.

161503161575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54286811 (or 54286806 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 161503161575 in words is "one hundred sixty-one billion, five hundred three million, one hundred sixty-one thousand, five hundred seventy-five".