63866842452 has 54 divisors (see below), whose sum is σ = 187798934778. Its totient is φ = 18247668768.

The previous prime is 63866842381. The next prime is 63866842463. The reversal of 63866842452 is 25424866836.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38421488196 + 25445354256 = 196014^2 + 159516^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18101083 + ... + 18104610.

Almost surely, 2^63866842452 is an apocalyptic number.

It is an amenable number.

63866842452 is an abundant number, since it is smaller than the sum of its proper divisors (123932092326).

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

63866842452 is a wasteful number, since it uses less digits than its factorization.

63866842452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36205717 (or 36205705 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The spelling of 63866842452 in words is "sixty-three billion, eight hundred sixty-six million, eight hundred forty-two thousand, four hundred fifty-two".