63955955871 has 6 divisors (see below), whose sum is σ = 92380825160. Its totient is φ = 42637303908.

The previous prime is 63955955863. The next prime is 63955955911. The reversal of 63955955871 is 17855955936.

63955955871 is a `hidden beast` number, since 6 + 3 + 9 + 5 + 5 + 9 + 558 + 71 = 666.

63955955871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63955955871 - 2³ = 63955955863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63955955799 and 63955955808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63955955821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3553108651 + ... + 3553108668.

Almost surely, 2^63955955871 is an apocalyptic number.

63955955871 is a deficient number, since it is larger than the sum of its proper divisors (28424869289).

63955955871 is a wasteful number, since it uses less digits than its factorization.

63955955871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106217325 (or 7106217322 counting only the distinct ones).

The product of its digits is 51030000, while the sum is 63.

The spelling of 63955955871 in words is "sixty-three billion, nine hundred fifty-five million, nine hundred fifty-five thousand, eight hundred seventy-one".