319985432904520 has 16 divisors (see below), whose sum is σ = 719967224035260. Its totient is φ = 127994173161792.

The previous prime is 319985432904503. The next prime is 319985432904521. The reversal of 319985432904520 is 25409234589913.

It can be written as a sum of positive squares in 2 ways, for example, as 262250753328964 + 57734679575556 = 16194158^2 + 7598334^2 .

It is not an unprimeable number, because it can be changed into a prime (319985432904521) 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, 3999817911267 + ... + 3999817911346.

Almost surely, 2^{319985432904520} is an apocalyptic number.

It is an amenable number.

319985432904520 is an abundant number, since it is smaller than the sum of its proper divisors (399981791130740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

319985432904520 is a wasteful number, since it uses less digits than its factorization.

319985432904520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999635822624 (or 7999635822620 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 64.

The spelling of 319985432904520 in words is "three hundred nineteen trillion, nine hundred eighty-five billion, four hundred thirty-two million, nine hundred four thousand, five hundred twenty".