2163081408831 has 80 divisors (see below), whose sum is σ = 3729984580608. Its totient is φ = 1223635248000.

The previous prime is 2163081408823. The next prime is 2163081408857. The reversal of 2163081408831 is 1388041803612.

2163081408831 is a `hidden beast` number, since 2 + 1 + 630 + 8 + 1 + 4 + 0 + 8 + 8 + 3 + 1 = 666.

It is not a de Polignac number, because 2163081408831 - 2³ = 2163081408823 is a prime.

It is a super-2 number, since 2×2163081408831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163081406831) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 289139611 + ... + 289147091.

Almost surely, 2^{2163081408831} is an apocalyptic number.

2163081408831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2163081408831 is a deficient number, since it is larger than the sum of its proper divisors (1566903171777).

2163081408831 is a wasteful number, since it uses less digits than its factorization.

2163081408831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554 (or 12545 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 2163081408831 in words is "two trillion, one hundred sixty-three billion, eighty-one million, four hundred eight thousand, eight hundred thirty-one".