156161000 has 64 divisors (see below), whose sum is σ = 384696000. Its totient is φ = 59169600.

The previous prime is 156160951. The next prime is 156161003. The reversal of 156161000 is 161651.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (156161003) 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, 14891 + ... + 23109.

It is an arithmetic number, because the mean of its divisors is an integer number (6010875).

Almost surely, 2^156161000 is an apocalyptic number.

156161000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156161000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192348000).

156161000 is an abundant number, since it is smaller than the sum of its proper divisors (228535000).

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

156161000 is a wasteful number, since it uses less digits than its factorization.

156161000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8259 (or 8245 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 156161000 is about 12496.4394929116. The cubic root of 156161000 is about 538.5063892520.

The spelling of 156161000 in words is "one hundred fifty-six million, one hundred sixty-one thousand".