63959557532481 has 16 divisors (see below), whose sum is σ = 102043738513920. Its totient is φ = 39359727712080.

The previous prime is 63959557532399. The next prime is 63959557532653. The reversal of 63959557532481 is 18423575595936.

63959557532481 is a `hidden beast` number, since 6 + 3 + 9 + 5 + 9 + 5 + 5 + 7 + 532 + 4 + 81 = 666.

It is not a de Polignac number, because 63959557532481 - 2¹⁸ = 63959557270337 is a prime.

It is a super-2 number, since 2×63959557532481² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63959557531481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91110480465 + ... + 91110481166.

It is an arithmetic number, because the mean of its divisors is an integer number (6377733657120).

Almost surely, 2^{63959557532481} is an apocalyptic number.

It is an amenable number.

63959557532481 is a deficient number, since it is larger than the sum of its proper divisors (38084180981439).

63959557532481 is a wasteful number, since it uses less digits than its factorization.

63959557532481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182220961653 (or 182220961647 counting only the distinct ones).

The product of its digits is 1224720000, while the sum is 72.

The spelling of 63959557532481 in words is "sixty-three trillion, nine hundred fifty-nine billion, five hundred fifty-seven million, five hundred thirty-two thousand, four hundred eighty-one".