63953923671 has 24 divisors (see below), whose sum is σ = 105157443456. Its totient is φ = 37074737040.

The previous prime is 63953923669. The next prime is 63953923679. The reversal of 63953923671 is 17632935936.

63953923671 is a `hidden beast` number, since 6 + 3 + 9 + 539 + 2 + 36 + 71 = 666.

It is not a de Polignac number, because 63953923671 - 2¹ = 63953923669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63953923679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14041185 + ... + 14045738.

It is an arithmetic number, because the mean of its divisors is an integer number (4381560144).

Almost surely, 2^63953923671 is an apocalyptic number.

63953923671 is a deficient number, since it is larger than the sum of its proper divisors (41203519785).

63953923671 is a wasteful number, since it uses less digits than its factorization.

63953923671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28086963 (or 28086960 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 54.

The spelling of 63953923671 in words is "sixty-three billion, nine hundred fifty-three million, nine hundred twenty-three thousand, six hundred seventy-one".