161830156 has 48 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 75418560.

The previous prime is 161830129. The next prime is 161830159. The reversal of 161830156 is 651038161.

It is not an unprimeable number, because it can be changed into a prime (161830159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375261 + ... + 375691.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^161830156 is an apocalyptic number.

It is an amenable number.

161830156 is a deficient number, since it is larger than the sum of its proper divisors (141537524).

161830156 is a wasteful number, since it uses less digits than its factorization.

161830156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 161830156 is about 12721.2482091971. The cubic root of 161830156 is about 544.9456007202.

The spelling of 161830156 in words is "one hundred sixty-one million, eight hundred thirty thousand, one hundred fifty-six".