320504385145 has 32 divisors (see below), whose sum is σ = 442370750976. Its totient is φ = 218364633600.

The previous prime is 320504385137. The next prime is 320504385181. The reversal of 320504385145 is 541583405023.

It is not a de Polignac number, because 320504385145 - 2³ = 320504385137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320504385098 and 320504385107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15309285 + ... + 15330205.

It is an arithmetic number, because the mean of its divisors is an integer number (13824085968).

Almost surely, 2^320504385145 is an apocalyptic number.

320504385145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320504385145 is a deficient number, since it is larger than the sum of its proper divisors (121866365831).

320504385145 is a wasteful number, since it uses less digits than its factorization.

320504385145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23721.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 320504385145 in words is "three hundred twenty billion, five hundred four million, three hundred eighty-five thousand, one hundred forty-five".