156442643 has 16 divisors (see below), whose sum is σ = 186700800. Its totient is φ = 130962888.

The previous prime is 156442639. The next prime is 156442651. The reversal of 156442643 is 346244651.

It is not a de Polignac number, because 156442643 - 2² = 156442639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156442603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9446 + ... + 20052.

It is an arithmetic number, because the mean of its divisors is an integer number (11668800).

Almost surely, 2^156442643 is an apocalyptic number.

156442643 is a deficient number, since it is larger than the sum of its proper divisors (30258157).

156442643 is an equidigital number, since it uses as much as digits as its factorization.

156442643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671 (or 10657 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 156442643 is about 12507.7033463382. The cubic root of 156442643 is about 538.8299345402.

The spelling of 156442643 in words is "one hundred fifty-six million, four hundred forty-two thousand, six hundred forty-three".