63955265836 has 144 divisors (see below), whose sum is σ = 148731674112. Its totient is φ = 23505672960.

The previous prime is 63955265807. The next prime is 63955265849. The reversal of 63955265836 is 63856255936.

63955265836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5682831 + ... + 5694073.

It is an arithmetic number, because the mean of its divisors is an integer number (1032858848).

Almost surely, 2^63955265836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63955265836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74365837056).

63955265836 is an abundant number, since it is smaller than the sum of its proper divisors (84776408276).

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

63955265836 is a wasteful number, since it uses less digits than its factorization.

63955265836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11372 (or 11359 counting only the distinct ones).

The product of its digits is 34992000, while the sum is 58.

The spelling of 63955265836 in words is "sixty-three billion, nine hundred fifty-five million, two hundred sixty-five thousand, eight hundred thirty-six".