63936489668 has 24 divisors (see below), whose sum is σ = 114781965312. Its totient is φ = 31147743744.

The previous prime is 63936489667. The next prime is 63936489697. The reversal of 63936489668 is 86698463936.

63936489668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63936489668² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63936489598 and 63936489607.

It is not an unprimeable number, because it can be changed into a prime (63936489667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720605 + ... + 804452.

It is an arithmetic number, because the mean of its divisors is an integer number (4782581888).

Almost surely, 2^63936489668 is an apocalyptic number.

It is an amenable number.

63936489668 is a deficient number, since it is larger than the sum of its proper divisors (50845475644).

63936489668 is a wasteful number, since it uses less digits than its factorization.

63936489668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525331 (or 1525329 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 68.

The spelling of 63936489668 in words is "sixty-three billion, nine hundred thirty-six million, four hundred eighty-nine thousand, six hundred sixty-eight".