63564112531 has 4 divisors (see below), whose sum is σ = 67303177992. Its totient is φ = 59825047072.

The previous prime is 63564112529. The next prime is 63564112537. The reversal of 63564112531 is 13521146536.

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

It is not a de Polignac number, because 63564112531 - 2¹ = 63564112529 is a prime.

It is a super-2 number, since 2×63564112531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63564112537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869532705 + ... + 1869532738.

It is an arithmetic number, because the mean of its divisors is an integer number (16825794498).

Almost surely, 2^63564112531 is an apocalyptic number.

63564112531 is a deficient number, since it is larger than the sum of its proper divisors (3739065461).

63564112531 is a wasteful number, since it uses less digits than its factorization.

63564112531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739065460.

The product of its digits is 64800, while the sum is 37.

The spelling of 63564112531 in words is "sixty-three billion, five hundred sixty-four million, one hundred twelve thousand, five hundred thirty-one".