320500723621156 has 243 divisors, whose sum is σ = 633863123321841. Its totient is φ = 141731354052288.

The previous prime is 320500723621139. The next prime is 320500723621279. The reversal of 320500723621156 is 651126327005023.

It is a happy number.

The square root of 320500723621156 is 17902534.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 47411349648100 + 273089373973056 = 6885590^2 + 16525416^2 .

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 1341007211685 + ... + 1341007211923.

Almost surely, 2^{320500723621156} is an apocalyptic number.

320500723621156 is the 17902534-th square number.

It is an amenable number.

320500723621156 is a deficient number, since it is larger than the sum of its proper divisors (313362399700685).

320500723621156 is an equidigital number, since it uses as much as digits as its factorization.

320500723621156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 320500723621156 in words is "three hundred twenty trillion, five hundred billion, seven hundred twenty-three million, six hundred twenty-one thousand, one hundred fifty-six".