63949842715 has 16 divisors (see below), whose sum is σ = 83722675680. Its totient is φ = 46505355520.

The previous prime is 63949842709. The next prime is 63949842823. The reversal of 63949842715 is 51724894936.

It is not a de Polignac number, because 63949842715 - 2³ = 63949842707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63949842715.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814821 + ... + 889849.

It is an arithmetic number, because the mean of its divisors is an integer number (5232667230).

Almost surely, 2^63949842715 is an apocalyptic number.

63949842715 is a deficient number, since it is larger than the sum of its proper divisors (19772832965).

63949842715 is a wasteful number, since it uses less digits than its factorization.

63949842715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90542.

The product of its digits is 13063680, while the sum is 58.

The spelling of 63949842715 in words is "sixty-three billion, nine hundred forty-nine million, eight hundred forty-two thousand, seven hundred fifteen".