156996180 has 144 divisors (see below), whose sum is σ = 533804544. Its totient is φ = 37013760.

The previous prime is 156996179. The next prime is 156996187. The reversal of 156996180 is 81699651.

156996180 is a `hidden beast` number, since 1 + 569 + 9 + 6 + 1 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156996187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72189 + ... + 74331.

It is an arithmetic number, because the mean of its divisors is an integer number (3706976).

Almost surely, 2^156996180 is an apocalyptic number.

156996180 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 156996180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266902272).

156996180 is an abundant number, since it is smaller than the sum of its proper divisors (376808364).

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

156996180 is a wasteful number, since it uses less digits than its factorization.

156996180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 2201 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 156996180 is about 12529.8116506195. The cubic root of 156996180 is about 539.4646958637.

The spelling of 156996180 in words is "one hundred fifty-six million, nine hundred ninety-six thousand, one hundred eighty".