315305380643 has 4 divisors (see below), whose sum is σ = 343969506168. Its totient is φ = 286641255120.

The previous prime is 315305380543. The next prime is 315305380669. The reversal of 315305380643 is 346083503513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346083503513 = 11 ⋅31462136683.

It is not a de Polignac number, because 315305380643 - 2¹⁰ = 315305379619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315305380643.

It is not an unprimeable number, because it can be changed into a prime (315305380543) 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, 14332062746 + ... + 14332062767.

It is an arithmetic number, because the mean of its divisors is an integer number (85992376542).

Almost surely, 2^315305380643 is an apocalyptic number.

315305380643 is a deficient number, since it is larger than the sum of its proper divisors (28664125525).

315305380643 is a wasteful number, since it uses less digits than its factorization.

315305380643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28664125524.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 315305380643 in words is "three hundred fifteen billion, three hundred five million, three hundred eighty thousand, six hundred forty-three".