63189203391 has 12 divisors (see below), whose sum is σ = 91323166480. Its totient is φ = 42103117440.

The previous prime is 63189203383. The next prime is 63189203411. The reversal of 63189203391 is 19330298136.

63189203391 is a `hidden beast` number, since 63 + 189 + 20 + 3 + 391 = 666.

It is not a de Polignac number, because 63189203391 - 2³ = 63189203383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63189203381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1900786 + ... + 1933743.

Almost surely, 2^63189203391 is an apocalyptic number.

63189203391 is a deficient number, since it is larger than the sum of its proper divisors (28133963089).

63189203391 is a wasteful number, since it uses less digits than its factorization.

63189203391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836366 (or 3836363 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 63189203391 in words is "sixty-three billion, one hundred eighty-nine million, two hundred three thousand, three hundred ninety-one".