63081765856 has 24 divisors (see below), whose sum is σ = 129591890064. Its totient is φ = 30169539840.

The previous prime is 63081765847. The next prime is 63081765871. The reversal of 63081765856 is 65856718036.

It is a super-2 number, since 2×63081765856² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 63081765797 and 63081765806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42853725 + ... + 42855196.

It is an arithmetic number, because the mean of its divisors is an integer number (5399662086).

Almost surely, 2^63081765856 is an apocalyptic number.

It is an amenable number.

63081765856 is an abundant number, since it is smaller than the sum of its proper divisors (66510124208).

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

63081765856 is a wasteful number, since it uses less digits than its factorization.

63081765856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85708954 (or 85708946 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 63081765856 in words is "sixty-three billion, eighty-one million, seven hundred sixty-five thousand, eight hundred fifty-six".