161960880 has 40 divisors (see below), whose sum is σ = 502079472. Its totient is φ = 43189504.

The previous prime is 161960861. The next prime is 161960893. The reversal of 161960880 is 88069161.

161960880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 337179 + ... + 337658.

Almost surely, 2^161960880 is an apocalyptic number.

161960880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161960880 is an abundant number, since it is smaller than the sum of its proper divisors (340118592).

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

161960880 is a wasteful number, since it uses less digits than its factorization.

161960880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674853 (or 674847 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 161960880 is about 12726.3851898330. The cubic root of 161960880 is about 545.0922942198.

The spelling of 161960880 in words is "one hundred sixty-one million, nine hundred sixty thousand, eight hundred eighty".