63942389651 has 32 divisors (see below), whose sum is σ = 77481331200. Its totient is φ = 51547415040.

The previous prime is 63942389633. The next prime is 63942389653. The reversal of 63942389651 is 15698324936.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63942389651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63942389653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16439915 + ... + 16443803.

It is an arithmetic number, because the mean of its divisors is an integer number (2421291600).

Almost surely, 2^63942389651 is an apocalyptic number.

63942389651 is a deficient number, since it is larger than the sum of its proper divisors (13538941549).

63942389651 is a wasteful number, since it uses less digits than its factorization.

63942389651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

The product of its digits is 8398080, while the sum is 56.

The spelling of 63942389651 in words is "sixty-three billion, nine hundred forty-two million, three hundred eighty-nine thousand, six hundred fifty-one".