63916566923 has 4 divisors (see below), whose sum is σ = 69727163928. Its totient is φ = 58105969920.

The previous prime is 63916566913. The next prime is 63916566943. The reversal of 63916566923 is 32966561936.

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 63916566923 - 2⁸ = 63916566667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63916566913) 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, 2905298486 + ... + 2905298507.

It is an arithmetic number, because the mean of its divisors is an integer number (17431790982).

Almost surely, 2^63916566923 is an apocalyptic number.

63916566923 is a deficient number, since it is larger than the sum of its proper divisors (5810597005).

63916566923 is a wasteful number, since it uses less digits than its factorization.

63916566923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810597004.

The product of its digits is 9447840, while the sum is 56.

The spelling of 63916566923 in words is "sixty-three billion, nine hundred sixteen million, five hundred sixty-six thousand, nine hundred twenty-three".