161945710575 has 48 divisors (see below), whose sum is σ = 292534050432. Its totient is φ = 78400080000.

The previous prime is 161945710523. The next prime is 161945710613. The reversal of 161945710575 is 575017549161.

It is not a de Polignac number, because 161945710575 - 2²⁷ = 161811492847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396840 + ... + 693810.

It is an arithmetic number, because the mean of its divisors is an integer number (6094459384).

Almost surely, 2^161945710575 is an apocalyptic number.

161945710575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161945710575 is a deficient number, since it is larger than the sum of its proper divisors (130588339857).

161945710575 is a wasteful number, since it uses less digits than its factorization.

161945710575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297656 (or 297651 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 51.

The spelling of 161945710575 in words is "one hundred sixty-one billion, nine hundred forty-five million, seven hundred ten thousand, five hundred seventy-five".