156156986 has 4 divisors (see below), whose sum is σ = 234235482. Its totient is φ = 78078492.

The previous prime is 156156971. The next prime is 156157049. The reversal of 156156986 is 689651651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 57532225 = 9931^2 + 7585^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 156156986.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 39039245 + ... + 39039248.

Almost surely, 2^156156986 is an apocalyptic number.

156156986 is a deficient number, since it is larger than the sum of its proper divisors (78078496).

156156986 is an equidigital number, since it uses as much as digits as its factorization.

156156986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78078495.

The product of its digits is 388800, while the sum is 47.

The square root of 156156986 is about 12496.2788861325. The cubic root of 156156986 is about 538.5017752465.

The spelling of 156156986 in words is "one hundred fifty-six million, one hundred fifty-six thousand, nine hundred eighty-six".