63564038391 has 16 divisors (see below), whose sum is σ = 97020670208. Its totient is φ = 36261864000.

The previous prime is 63564038383. The next prime is 63564038401. The reversal of 63564038391 is 19383046536.

It is not a de Polignac number, because 63564038391 - 2³ = 63564038383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63564038391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63564038891) 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, 2505565 + ... + 2530806.

It is an arithmetic number, because the mean of its divisors is an integer number (6063791888).

Almost surely, 2^63564038391 is an apocalyptic number.

63564038391 is a deficient number, since it is larger than the sum of its proper divisors (33456631817).

63564038391 is a wasteful number, since it uses less digits than its factorization.

63564038391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036982.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 63564038391 in words is "sixty-three billion, five hundred sixty-four million, thirty-eight thousand, three hundred ninety-one".