156151440 has 60 divisors (see below), whose sum is σ = 524411004. Its totient is φ = 41640192.

The previous prime is 156151403. The next prime is 156151441. The reversal of 156151440 is 44151651.

156151440 is a `hidden beast` number, since 1 + 5 + 615 + 1 + 4 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 105513984 + 50637456 = 10272^2 + 7116^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (156151441) 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 11 ways as a sum of consecutive naturals, for example, 107719 + ... + 109158.

Almost surely, 2^156151440 is an apocalyptic number.

156151440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156151440 is an abundant number, since it is smaller than the sum of its proper divisors (368259564).

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

156151440 is a wasteful number, since it uses less digits than its factorization.

156151440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216896 (or 216887 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 156151440 is about 12496.0569781031. The cubic root of 156151440 is about 538.4954001102.

The spelling of 156151440 in words is "one hundred fifty-six million, one hundred fifty-one thousand, four hundred forty".