63188376561 has 8 divisors (see below), whose sum is σ = 93612409760. Its totient is φ = 42125584356.

The previous prime is 63188376553. The next prime is 63188376619. The reversal of 63188376561 is 16567388136.

63188376561 is a `hidden beast` number, since 6 + 3 + 1 + 8 + 8 + 3 + 76 + 561 = 666.

It is not a de Polignac number, because 63188376561 - 2³ = 63188376553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63188376498 and 63188376507.

It is not an unprimeable number, because it can be changed into a prime (63188376541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170155095 + ... + 1170155148.

It is an arithmetic number, because the mean of its divisors is an integer number (11701551220).

Almost surely, 2^63188376561 is an apocalyptic number.

It is an amenable number.

63188376561 is a deficient number, since it is larger than the sum of its proper divisors (30424033199).

63188376561 is a wasteful number, since it uses less digits than its factorization.

63188376561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340310252 (or 2340310246 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 63188376561 in words is "sixty-three billion, one hundred eighty-eight million, three hundred seventy-six thousand, five hundred sixty-one".