161315087875 has 8 divisors (see below), whose sum is σ = 201321229824. Its totient is φ = 129052070200.

The previous prime is 161315087867. The next prime is 161315087881. The reversal of 161315087875 is 578780513161.

It is not a de Polignac number, because 161315087875 - 2³ = 161315087867 is a prime.

It is a super-2 number, since 2×161315087875² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645260227 + ... + 645260476.

It is an arithmetic number, because the mean of its divisors is an integer number (25165153728).

Almost surely, 2^161315087875 is an apocalyptic number.

161315087875 is a deficient number, since it is larger than the sum of its proper divisors (40006141949).

161315087875 is an equidigital number, since it uses as much as digits as its factorization.

161315087875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290520718 (or 1290520708 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 161315087875 in words is "one hundred sixty-one billion, three hundred fifteen million, eighty-seven thousand, eight hundred seventy-five".