161477267178 has 16 divisors (see below), whose sum is σ = 322987569696. Its totient is φ = 53820249840.

The previous prime is 161477267167. The next prime is 161477267179. The reversal of 161477267178 is 871762774161.

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 7 ways as a sum of consecutive naturals, for example, 1312701 + ... + 1430432.

It is an arithmetic number, because the mean of its divisors is an integer number (20186723106).

Almost surely, 2^161477267178 is an apocalyptic number.

161477267178 is an abundant number, since it is smaller than the sum of its proper divisors (161510302518).

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

161477267178 is a wasteful number, since it uses less digits than its factorization.

161477267178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752949.

The product of its digits is 5531904, while the sum is 57.

The spelling of 161477267178 in words is "one hundred sixty-one billion, four hundred seventy-seven million, two hundred sixty-seven thousand, one hundred seventy-eight".