315640820818 has 16 divisors (see below), whose sum is σ = 475125215040. Its totient is φ = 157265858736.

The previous prime is 315640820813. The next prime is 315640820861. The reversal of 315640820818 is 818028046513.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7577893 + ... + 7619431.

It is an arithmetic number, because the mean of its divisors is an integer number (29695325940).

Almost surely, 2^315640820818 is an apocalyptic number.

315640820818 is a deficient number, since it is larger than the sum of its proper divisors (159484394222).

315640820818 is a wasteful number, since it uses less digits than its factorization.

315640820818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54801.

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 315640820818 in words is "three hundred fifteen billion, six hundred forty million, eight hundred twenty thousand, eight hundred eighteen".