156921912 has 144 divisors (see below), whose sum is σ = 520626600. Its totient is φ = 42456960.

The previous prime is 156921901. The next prime is 156921913. The reversal of 156921912 is 219129651.

156921912 is a `hidden beast` number, since 1 + 569 + 2 + 1 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156921913) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65862 + ... + 68202.

Almost surely, 2^156921912 is an apocalyptic number.

156921912 is a gapful number since it is divisible by the number (12) 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 156921912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260313300).

156921912 is an abundant number, since it is smaller than the sum of its proper divisors (363704688).

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

156921912 is a wasteful number, since it uses less digits than its factorization.

156921912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2372 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 156921912 is about 12526.8476481515. The cubic root of 156921912 is about 539.3796167589.

The spelling of 156921912 in words is "one hundred fifty-six million, nine hundred twenty-one thousand, nine hundred twelve".