63311807998 has 4 divisors (see below), whose sum is σ = 94967712000. Its totient is φ = 31655903998.

The previous prime is 63311807963. The next prime is 63311808067. The reversal of 63311807998 is 89970811336.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15827951998 + ... + 15827952001.

It is an arithmetic number, because the mean of its divisors is an integer number (23741928000).

Almost surely, 2^63311807998 is an apocalyptic number.

63311807998 is a deficient number, since it is larger than the sum of its proper divisors (31655904002).

63311807998 is a wasteful number, since it uses less digits than its factorization.

63311807998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31655904001.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 63311807998 in words is "sixty-three billion, three hundred eleven million, eight hundred seven thousand, nine hundred ninety-eight".