315640820819 has 12 divisors (see below), whose sum is σ = 336546662400. Its totient is φ = 295969277568.

The previous prime is 315640820813. The next prime is 315640820861. The reversal of 315640820819 is 918028046513.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-315640820819 is a prime.

It is a super-2 number, since 2×315640820819² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315640820813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1952339 + ... + 2107820.

It is an arithmetic number, because the mean of its divisors is an integer number (28045555200).

Almost surely, 2^315640820819 is an apocalyptic number.

315640820819 is a deficient number, since it is larger than the sum of its proper divisors (20905841581).

315640820819 is a wasteful number, since it uses less digits than its factorization.

315640820819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060462 (or 4060445 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 315640820819 in words is "three hundred fifteen billion, six hundred forty million, eight hundred twenty thousand, eight hundred nineteen".