161797110 has 32 divisors (see below), whose sum is σ = 389878272. Its totient is φ = 42972000.

The previous prime is 161797087. The next prime is 161797123. The reversal of 161797110 is 11797161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3214 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (12183696).

Almost surely, 2^161797110 is an apocalyptic number.

161797110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161797110 is an abundant number, since it is smaller than the sum of its proper divisors (228081162).

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

161797110 is a wasteful number, since it uses less digits than its factorization.

161797110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21748.

The product of its (nonzero) digits is 2646, while the sum is 33.

The square root of 161797110 is about 12719.9492923518. The cubic root of 161797110 is about 544.9085052478.

The spelling of 161797110 in words is "one hundred sixty-one million, seven hundred ninety-seven thousand, one hundred ten".