156420656 has 20 divisors (see below), whose sum is σ = 346360272. Its totient is φ = 67037376.

The previous prime is 156420629. The next prime is 156420659. The reversal of 156420656 is 656024651.

It is not an unprimeable number, because it can be changed into a prime (156420659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698195 + ... + 698418.

Almost surely, 2^156420656 is an apocalyptic number.

156420656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

156420656 is an abundant number, since it is smaller than the sum of its proper divisors (189939616).

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

156420656 is a wasteful number, since it uses less digits than its factorization.

156420656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396628 (or 1396622 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 156420656 is about 12506.8243771151. The cubic root of 156420656 is about 538.8046903386.

The spelling of 156420656 in words is "one hundred fifty-six million, four hundred twenty thousand, six hundred fifty-six".