161477267177 has 4 divisors (see below), whose sum is σ = 161745948756. Its totient is φ = 161208585600.

The previous prime is 161477267167. The next prime is 161477267179. The reversal of 161477267177 is 771762774161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84268864681 + 77208402496 = 290291^2 + 277864^2 .

It is a cyclic number.

It is not a de Polignac number, because 161477267177 - 2²⁴ = 161460489961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161477267179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134339888 + ... + 134341089.

It is an arithmetic number, because the mean of its divisors is an integer number (40436487189).

Almost surely, 2^161477267177 is an apocalyptic number.

It is an amenable number.

161477267177 is a deficient number, since it is larger than the sum of its proper divisors (268681579).

161477267177 is an equidigital number, since it uses as much as digits as its factorization.

161477267177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268681578.

The product of its digits is 4840416, while the sum is 56.

The spelling of 161477267177 in words is "one hundred sixty-one billion, four hundred seventy-seven million, two hundred sixty-seven thousand, one hundred seventy-seven".