161477267180 has 24 divisors (see below), whose sum is σ = 339131263968. Its totient is φ = 64585382528.

The previous prime is 161477267179. The next prime is 161477267201. The reversal of 161477267180 is 81762774161.

It is a super-2 number, since 2×161477267180² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101384 + ... + 577263.

It is an arithmetic number, because the mean of its divisors is an integer number (14130469332).

Almost surely, 2^161477267180 is an apocalyptic number.

161477267180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161477267180 is an abundant number, since it is smaller than the sum of its proper divisors (177653996788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161477267180 is a wasteful number, since it uses less digits than its factorization.

161477267180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690553 (or 690551 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 161477267180 in words is "one hundred sixty-one billion, four hundred seventy-seven million, two hundred sixty-seven thousand, one hundred eighty".