63159381831 has 32 divisors (see below), whose sum is σ = 103756036608. Its totient is φ = 33279523200.

The previous prime is 63159381827. The next prime is 63159381833. The reversal of 63159381831 is 13818395136.

It is not a de Polignac number, because 63159381831 - 2² = 63159381827 is a prime.

It is a super-2 number, since 2×63159381831² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63159381833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136381 + ... + 380681.

It is an arithmetic number, because the mean of its divisors is an integer number (3242376144).

Almost surely, 2^63159381831 is an apocalyptic number.

63159381831 is a deficient number, since it is larger than the sum of its proper divisors (40596654777).

63159381831 is a wasteful number, since it uses less digits than its factorization.

63159381831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245271.

The product of its digits is 466560, while the sum is 48.

The spelling of 63159381831 in words is "sixty-three billion, one hundred fifty-nine million, three hundred eighty-one thousand, eight hundred thirty-one".