161056720507371 has 16 divisors (see below), whose sum is σ = 231302972117280. Its totient is φ = 99093810816000.

The previous prime is 161056720507367. The next prime is 161056720507379. The reversal of 161056720507371 is 173705027650161.

It is not a de Polignac number, because 161056720507371 - 2² = 161056720507367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161056720507379) 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, 375140806 + ... + 375569883.

It is an arithmetic number, because the mean of its divisors is an integer number (14456435757330).

Almost surely, 2^{161056720507371} is an apocalyptic number.

161056720507371 is a deficient number, since it is larger than the sum of its proper divisors (70246251609909).

161056720507371 is a wasteful number, since it uses less digits than its factorization.

161056720507371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750716206.

The product of its (nonzero) digits is 1852200, while the sum is 51.

The spelling of 161056720507371 in words is "one hundred sixty-one trillion, fifty-six billion, seven hundred twenty million, five hundred seven thousand, three hundred seventy-one".