63640667315 has 4 divisors (see below), whose sum is σ = 76368800784. Its totient is φ = 50912533848.

The previous prime is 63640667309. The next prime is 63640667327. The reversal of 63640667315 is 51376604636.

63640667315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63640667315 - 2²⁸ = 63372231859 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 63640667315.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6364066727 + ... + 6364066736.

It is an arithmetic number, because the mean of its divisors is an integer number (19092200196).

Almost surely, 2^63640667315 is an apocalyptic number.

63640667315 is a deficient number, since it is larger than the sum of its proper divisors (12728133469).

63640667315 is a wasteful number, since it uses less digits than its factorization.

63640667315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12728133468.

The product of its (nonzero) digits is 1632960, while the sum is 47.

The spelling of 63640667315 in words is "sixty-three billion, six hundred forty million, six hundred sixty-seven thousand, three hundred fifteen".