63999567922 has 8 divisors (see below), whose sum is σ = 101646372636. Its totient is φ = 30117443712.

The previous prime is 63999567883. The next prime is 63999567923. The reversal of 63999567922 is 22976599936.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60628720441 + 3370847481 = 246229^2 + 58059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (63999567923) 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, 941170083 + ... + 941170150.

Almost surely, 2^63999567922 is an apocalyptic number.

63999567922 is a deficient number, since it is larger than the sum of its proper divisors (37646804714).

63999567922 is a wasteful number, since it uses less digits than its factorization.

63999567922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882340252.

The product of its digits is 99202320, while the sum is 67.

The spelling of 63999567922 in words is "sixty-three billion, nine hundred ninety-nine million, five hundred sixty-seven thousand, nine hundred twenty-two".