63868403391 has 16 divisors (see below), whose sum is σ = 92001492576. Its totient is φ = 39178054656.

The previous prime is 63868403381. The next prime is 63868403393. The reversal of 63868403391 is 19330486836.

It is not a de Polignac number, because 63868403391 - 2⁵ = 63868403359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63868403393) 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, 2603850 + ... + 2628263.

It is an arithmetic number, because the mean of its divisors is an integer number (5750093286).

Almost surely, 2^63868403391 is an apocalyptic number.

63868403391 is a deficient number, since it is larger than the sum of its proper divisors (28133089185).

63868403391 is a wasteful number, since it uses less digits than its factorization.

63868403391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232442.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 63868403391 in words is "sixty-three billion, eight hundred sixty-eight million, four hundred three thousand, three hundred ninety-one".