161359720 has 32 divisors (see below), whose sum is σ = 378846720. Its totient is φ = 61737280.

The previous prime is 161359687. The next prime is 161359727. The reversal of 161359720 is 27953161.

161359720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161359727) 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, 86776 + ... + 88615.

It is an arithmetic number, because the mean of its divisors is an integer number (11838960).

Almost surely, 2^161359720 is an apocalyptic number.

161359720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161359720 is an abundant number, since it is smaller than the sum of its proper divisors (217487000).

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

161359720 is a wasteful number, since it uses less digits than its factorization.

161359720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175425 (or 175421 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 161359720 is about 12702.7445853249. The cubic root of 161359720 is about 544.4170407174.

The spelling of 161359720 in words is "one hundred sixty-one million, three hundred fifty-nine thousand, seven hundred twenty".