156155640 has 32 divisors (see below), whose sum is σ = 468467280. Its totient is φ = 41641472.

The previous prime is 156155609. The next prime is 156155641. The reversal of 156155640 is 46551651.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156155641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650529 + ... + 650768.

Almost surely, 2^156155640 is an apocalyptic number.

156155640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156155640 is an abundant number, since it is smaller than the sum of its proper divisors (312311640).

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

156155640 is a wasteful number, since it uses less digits than its factorization.

156155640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301311 (or 1301307 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 156155640 is about 12496.2250299841. The cubic root of 156155640 is about 538.5002280311.

The spelling of 156155640 in words is "one hundred fifty-six million, one hundred fifty-five thousand, six hundred forty".