63390221391 has 16 divisors (see below), whose sum is σ = 96786676224. Its totient is φ = 36150963744.

The previous prime is 63390221357. The next prime is 63390221393. The reversal of 63390221391 is 19312209336.

It is not a de Polignac number, because 63390221391 - 2²² = 63386027087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63390221393) 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, 2990016 + ... + 3011141.

It is an arithmetic number, because the mean of its divisors is an integer number (6049167264).

Almost surely, 2^63390221391 is an apocalyptic number.

63390221391 is a deficient number, since it is larger than the sum of its proper divisors (33396454833).

63390221391 is a wasteful number, since it uses less digits than its factorization.

63390221391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001670.

The product of its (nonzero) digits is 52488, while the sum is 39.

The spelling of 63390221391 in words is "sixty-three billion, three hundred ninety million, two hundred twenty-one thousand, three hundred ninety-one".