63881319507 has 4 divisors (see below), whose sum is σ = 85175092680. Its totient is φ = 42587546336.

The previous prime is 63881319497. The next prime is 63881319529. The reversal of 63881319507 is 70591318836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63881319507 - 2⁷ = 63881319379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63881319507.

It is not an unprimeable number, because it can be changed into a prime (63881312507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10646886582 + ... + 10646886587.

It is an arithmetic number, because the mean of its divisors is an integer number (21293773170).

Almost surely, 2^63881319507 is an apocalyptic number.

63881319507 is a deficient number, since it is larger than the sum of its proper divisors (21293773173).

63881319507 is a wasteful number, since it uses less digits than its factorization.

63881319507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21293773172.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 63881319507 in words is "sixty-three billion, eight hundred eighty-one million, three hundred nineteen thousand, five hundred seven".