63891280162656 has 120 divisors (see below), whose sum is σ = 187911946724040. Its totient is φ = 21296020442112.

The previous prime is 63891280162643. The next prime is 63891280162663. The reversal of 63891280162656 is 65626108219836.

It is a happy number.

63891280162656 is a `hidden beast` number, since 6 + 3 + 8 + 91 + 280 + 1 + 6 + 265 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 63891280162593 and 63891280162602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51687955 + ... + 52909613.

It is an arithmetic number, because the mean of its divisors is an integer number (1565932889367).

Almost surely, 2^{63891280162656} is an apocalyptic number.

It is an amenable number.

63891280162656 is an abundant number, since it is smaller than the sum of its proper divisors (124020666561384).

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

63891280162656 is a wasteful number, since it uses less digits than its factorization.

63891280162656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241858 (or 1241841 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 63891280162656 in words is "sixty-three trillion, eight hundred ninety-one billion, two hundred eighty million, one hundred sixty-two thousand, six hundred fifty-six".