161377805797 has 32 divisors (see below), whose sum is σ = 183650423040. Its totient is φ = 140682769920.

The previous prime is 161377805777. The next prime is 161377805807. The reversal of 161377805797 is 797508773161.

It is not a de Polignac number, because 161377805797 - 2¹¹ = 161377803749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161377805777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20140522 + ... + 20148532.

It is an arithmetic number, because the mean of its divisors is an integer number (5739075720).

Almost surely, 2^161377805797 is an apocalyptic number.

It is an amenable number.

161377805797 is a deficient number, since it is larger than the sum of its proper divisors (22272617243).

161377805797 is a wasteful number, since it uses less digits than its factorization.

161377805797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8893.

The product of its (nonzero) digits is 15558480, while the sum is 61.

The spelling of 161377805797 in words is "one hundred sixty-one billion, three hundred seventy-seven million, eight hundred five thousand, seven hundred ninety-seven".