8161582463881 has 16 divisors (see below), whose sum is σ = 10175723510400. Its totient is φ = 6359522100480.

The previous prime is 8161582463873. The next prime is 8161582463929. The reversal of 8161582463881 is 1883642851618.

It is a cyclic number.

It is not a de Polignac number, because 8161582463881 - 2³ = 8161582463873 is a prime.

It is a super-2 number, since 2×8161582463881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8161582463831) 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, 2014545 + ... + 4514593.

It is an arithmetic number, because the mean of its divisors is an integer number (635982719400).

Almost surely, 2^{8161582463881} is an apocalyptic number.

It is an amenable number.

8161582463881 is a deficient number, since it is larger than the sum of its proper divisors (2014141046519).

8161582463881 is a wasteful number, since it uses less digits than its factorization.

8161582463881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542464.

The product of its digits is 17694720, while the sum is 61.

The spelling of 8161582463881 in words is "eight trillion, one hundred sixty-one billion, five hundred eighty-two million, four hundred sixty-three thousand, eight hundred eighty-one".