63107415978 has 16 divisors (see below), whose sum is σ = 126361774560. Its totient is φ = 21011314896.

The previous prime is 63107415937. The next prime is 63107415991. The reversal of 63107415978 is 87951470136.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63107415978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6117025 + ... + 6127332.

It is an arithmetic number, because the mean of its divisors is an integer number (7897610910).

Almost surely, 2^63107415978 is an apocalyptic number.

63107415978 is an abundant number, since it is smaller than the sum of its proper divisors (63254358582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63107415978 is a wasteful number, since it uses less digits than its factorization.

63107415978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12245221.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 63107415978 in words is "sixty-three billion, one hundred seven million, four hundred fifteen thousand, nine hundred seventy-eight".