63748486791 has 12 divisors (see below), whose sum is σ = 100452161160. Its totient is φ = 38635446480.

The previous prime is 63748486783. The next prime is 63748486811. The reversal of 63748486791 is 19768484736.

63748486791 is a `hidden beast` number, since 6 + 3 + 7 + 484 + 8 + 67 + 91 = 666.

It is not a de Polignac number, because 63748486791 - 2³ = 63748486783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63748486771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321961956 + ... + 321962153.

It is an arithmetic number, because the mean of its divisors is an integer number (8371013430).

Almost surely, 2^63748486791 is an apocalyptic number.

63748486791 is a deficient number, since it is larger than the sum of its proper divisors (36703674369).

63748486791 is a wasteful number, since it uses less digits than its factorization.

63748486791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643924126 (or 643924123 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 63748486791 in words is "sixty-three billion, seven hundred forty-eight million, four hundred eighty-six thousand, seven hundred ninety-one".