156320256235631 has 4 divisors (see below), whose sum is σ = 157315926657672. Its totient is φ = 155324585813592.

The previous prime is 156320256235609. The next prime is 156320256235709. The reversal of 156320256235631 is 136532652023651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156320256235631 is a prime.

It is a super-2 number, since 2×156320256235631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156320256235631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156320256231631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497835210785 + ... + 497835211098.

It is an arithmetic number, because the mean of its divisors is an integer number (39328981664418).

Almost surely, 2^{156320256235631} is an apocalyptic number.

156320256235631 is a deficient number, since it is larger than the sum of its proper divisors (995670422041).

156320256235631 is an equidigital number, since it uses as much as digits as its factorization.

156320256235631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995670422040.

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 156320256235631 in words is "one hundred fifty-six trillion, three hundred twenty billion, two hundred fifty-six million, two hundred thirty-five thousand, six hundred thirty-one".