161590015873 has 16 divisors (see below), whose sum is σ = 189900047232. Its totient is φ = 135557136000.

The previous prime is 161590015871. The next prime is 161590015897. The reversal of 161590015873 is 378510095161.

It is not a de Polignac number, because 161590015873 - 2¹ = 161590015871 is a prime.

It is a super-2 number, since 2×161590015873² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161590015871) 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, 279253 + ... + 633373.

It is an arithmetic number, because the mean of its divisors is an integer number (11868752952).

Almost surely, 2^161590015873 is an apocalyptic number.

161590015873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161590015873 is a deficient number, since it is larger than the sum of its proper divisors (28310031359).

161590015873 is a wasteful number, since it uses less digits than its factorization.

161590015873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357336.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 161590015873 in words is "one hundred sixty-one billion, five hundred ninety million, fifteen thousand, eight hundred seventy-three".