63640463630 has 32 divisors (see below), whose sum is σ = 117423734400. Its totient is φ = 24819022080.

The previous prime is 63640463563. The next prime is 63640463641. The reversal of 63640463630 is 3636404636.

It is a happy number.

It is a super-2 number, since 2×63640463630² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

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, 584987 + ... + 685193.

It is an arithmetic number, because the mean of its divisors is an integer number (3669491700).

Almost surely, 2^63640463630 is an apocalyptic number.

63640463630 is a deficient number, since it is larger than the sum of its proper divisors (53783270770).

63640463630 is a wasteful number, since it uses less digits than its factorization.

63640463630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101804.

The product of its (nonzero) digits is 559872, while the sum is 41.

The spelling of 63640463630 in words is "sixty-three billion, six hundred forty million, four hundred sixty-three thousand, six hundred thirty".