320156551440215 has 128 divisors (see below), whose sum is σ = 455309781239808. Its totient is φ = 211624979005440.

The previous prime is 320156551440211. The next prime is 320156551440223. The reversal of 320156551440215 is 512044155651023.

It is a happy number.

It is not a de Polignac number, because 320156551440215 - 2² = 320156551440211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320156551440211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6838444487 + ... + 6838491303.

It is an arithmetic number, because the mean of its divisors is an integer number (3557107665936).

Almost surely, 2^{320156551440215} is an apocalyptic number.

320156551440215 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320156551440215 is a deficient number, since it is larger than the sum of its proper divisors (135153229799593).

320156551440215 is a wasteful number, since it uses less digits than its factorization.

320156551440215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47337.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 320156551440215 in words is "three hundred twenty trillion, one hundred fifty-six billion, five hundred fifty-one million, four hundred forty thousand, two hundred fifteen".