156421632 has 40 divisors (see below), whose sum is σ = 416721096. Its totient is φ = 52140032.

The previous prime is 156421631. The next prime is 156421633. The reversal of 156421632 is 236124651.

It is an interprime number because it is at equal distance from previous prime (156421631) and next prime (156421633).

It is a self number, because there is not a number n which added to its sum of digits gives 156421632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156421631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49383 + ... + 52454.

Almost surely, 2^156421632 is an apocalyptic number.

156421632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156421632 is an abundant number, since it is smaller than the sum of its proper divisors (260299464).

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

156421632 is an equidigital number, since it uses as much as digits as its factorization.

156421632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101858 (or 101842 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 156421632 is about 12506.8633957520. The cubic root of 156421632 is about 538.8058109755.

The spelling of 156421632 in words is "one hundred fifty-six million, four hundred twenty-one thousand, six hundred thirty-two".