156338961 has 4 divisors (see below), whose sum is σ = 208451952. Its totient is φ = 104225972.

The previous prime is 156338951. The next prime is 156338969. The reversal of 156338961 is 169833651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 156338961 - 2⁵ = 156338929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156338969) 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, 26056491 + ... + 26056496.

It is an arithmetic number, because the mean of its divisors is an integer number (52112988).

Almost surely, 2^156338961 is an apocalyptic number.

It is an amenable number.

156338961 is a deficient number, since it is larger than the sum of its proper divisors (52112991).

156338961 is an equidigital number, since it uses as much as digits as its factorization.

156338961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52112990.

The product of its digits is 116640, while the sum is 42.

The square root of 156338961 is about 12503.5579336443. The cubic root of 156338961 is about 538.7108721357.

The spelling of 156338961 in words is "one hundred fifty-six million, three hundred thirty-eight thousand, nine hundred sixty-one".