315081994820 has 24 divisors (see below), whose sum is σ = 661924749528. Its totient is φ = 125984691200.

The previous prime is 315081994819. The next prime is 315081994873. The reversal of 315081994820 is 28499180513.

It can be written as a sum of positive squares in 4 ways, for example, as 159923209216 + 155158785604 = 399904^2 + 393902^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2952941 + ... + 3057780.

It is an arithmetic number, because the mean of its divisors is an integer number (27580197897).

Almost surely, 2^315081994820 is an apocalyptic number.

It is an amenable number.

315081994820 is an abundant number, since it is smaller than the sum of its proper divisors (346842754708).

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

315081994820 is a wasteful number, since it uses less digits than its factorization.

315081994820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013351 (or 6013349 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 315081994820 in words is "three hundred fifteen billion, eighty-one million, nine hundred ninety-four thousand, eight hundred twenty".