161125296945 has 16 divisors (see below), whose sum is σ = 258277013952. Its totient is φ = 85774645440.

The previous prime is 161125296923. The next prime is 161125296961. The reversal of 161125296945 is 549692521161.

It is not a de Polignac number, because 161125296945 - 2²⁸ = 160856861489 is a prime.

It is a super-2 number, since 2×161125296945² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 9919507 + ... + 9935736.

It is an arithmetic number, because the mean of its divisors is an integer number (16142313372).

Almost surely, 2^161125296945 is an apocalyptic number.

161125296945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161125296945 is a deficient number, since it is larger than the sum of its proper divisors (97151717007).

161125296945 is a wasteful number, since it uses less digits than its factorization.

161125296945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19855792.

The product of its digits is 1166400, while the sum is 51.

The spelling of 161125296945 in words is "one hundred sixty-one billion, one hundred twenty-five million, two hundred ninety-six thousand, nine hundred forty-five".