161100156 has 24 divisors (see below), whose sum is σ = 429600640. Its totient is φ = 46028592.

The previous prime is 161100127. The next prime is 161100167. The reversal of 161100156 is 651001161.

161100156 is nontrivially palindromic in base 11.

161100156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 958846 + ... + 959013.

Almost surely, 2^161100156 is an apocalyptic number.

It is an amenable number.

161100156 is an abundant number, since it is smaller than the sum of its proper divisors (268500484).

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

161100156 is a wasteful number, since it uses less digits than its factorization.

161100156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917873 (or 1917871 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 161100156 is about 12692.5236261352. The cubic root of 161100156 is about 544.1249667852.

The spelling of 161100156 in words is "one hundred sixty-one million, one hundred thousand, one hundred fifty-six".