156121680 has 160 divisors (see below), whose sum is σ = 568713600. Its totient is φ = 34928640.

The previous prime is 156121627. The next prime is 156121697. The reversal of 156121680 is 86121651.

156121680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×156121680³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32046 + ... + 36594.

It is an arithmetic number, because the mean of its divisors is an integer number (3554460).

Almost surely, 2^156121680 is an apocalyptic number.

156121680 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 156121680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284356800).

156121680 is an abundant number, since it is smaller than the sum of its proper divisors (412591920).

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

156121680 is a wasteful number, since it uses less digits than its factorization.

156121680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4589 (or 4583 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 156121680 is about 12494.8661457416. The cubic root of 156121680 is about 538.4611883619.

The spelling of 156121680 in words is "one hundred fifty-six million, one hundred twenty-one thousand, six hundred eighty".