63780581998 has 16 divisors (see below), whose sum is σ = 109515364704. Its totient is φ = 27290229120.

The previous prime is 63780581987. The next prime is 63780582071. The reversal of 63780581998 is 89918508736.

It is a congruent number.

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, 3683223 + ... + 3700498.

It is an arithmetic number, because the mean of its divisors is an integer number (6844710294).

Almost surely, 2^63780581998 is an apocalyptic number.

63780581998 is a deficient number, since it is larger than the sum of its proper divisors (45734782706).

63780581998 is a wasteful number, since it uses less digits than its factorization.

63780581998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384347.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 63780581998 in words is "sixty-three billion, seven hundred eighty million, five hundred eighty-one thousand, nine hundred ninety-eight".