63890650788 has 12 divisors (see below), whose sum is σ = 149078185200. Its totient is φ = 21296883592.

The previous prime is 63890650777. The next prime is 63890650799. The reversal of 63890650788 is 88705609836.

It is an interprime number because it is at equal distance from previous prime (63890650777) and next prime (63890650799).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×63890650788² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2662110438 + ... + 2662110461.

It is an arithmetic number, because the mean of its divisors is an integer number (12423182100).

Almost surely, 2^63890650788 is an apocalyptic number.

It is an amenable number.

63890650788 is an abundant number, since it is smaller than the sum of its proper divisors (85187534412).

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

63890650788 is a wasteful number, since it uses less digits than its factorization.

63890650788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324220906 (or 5324220904 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 63890650788 in words is "sixty-three billion, eight hundred ninety million, six hundred fifty thousand, seven hundred eighty-eight".