8131804822561 has 8 divisors (see below), whose sum is σ = 9325209628224. Its totient is φ = 6946329617520.

The previous prime is 8131804822543. The next prime is 8131804822573. The reversal of 8131804822561 is 1652284081318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8131804822561 - 2⁷ = 8131804822433 is a prime.

It is a super-2 number, since 2×8131804822561² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8131804822511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1982397955 + ... + 1982402056.

It is an arithmetic number, because the mean of its divisors is an integer number (1165651203528).

Almost surely, 2^{8131804822561} is an apocalyptic number.

It is an amenable number.

8131804822561 is a deficient number, since it is larger than the sum of its proper divisors (1193404805663).

8131804822561 is a wasteful number, since it uses less digits than its factorization.

8131804822561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964800311.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 8131804822561 in words is "eight trillion, one hundred thirty-one billion, eight hundred four million, eight hundred twenty-two thousand, five hundred sixty-one".