315809785155 has 32 divisors (see below), whose sum is σ = 507953318400. Its totient is φ = 167546396160.

The previous prime is 315809785097. The next prime is 315809785169. The reversal of 315809785155 is 551587908513.

It is not a de Polignac number, because 315809785155 - 2⁹ = 315809784643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315809785095 and 315809785104.

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, 16470604 + ... + 16489766.

It is an arithmetic number, because the mean of its divisors is an integer number (15873541200).

Almost surely, 2^315809785155 is an apocalyptic number.

315809785155 is a deficient number, since it is larger than the sum of its proper divisors (192143533245).

315809785155 is a wasteful number, since it uses less digits than its factorization.

315809785155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891.

The product of its (nonzero) digits is 7560000, while the sum is 57.

The spelling of 315809785155 in words is "three hundred fifteen billion, eight hundred nine million, seven hundred eighty-five thousand, one hundred fifty-five".