81079884411 has 16 divisors (see below), whose sum is σ = 109960830720. Its totient is φ = 53126464160.

The previous prime is 81079884377. The next prime is 81079884481. The reversal of 81079884411 is 11448897018.

It is a cyclic number.

It is not a de Polignac number, because 81079884411 - 2⁷ = 81079884283 is a prime.

It is a super-2 number, since 2×81079884411² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81079884481) 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, 895441 + ... + 981821.

It is an arithmetic number, because the mean of its divisors is an integer number (6872551920).

Almost surely, 2^81079884411 is an apocalyptic number.

81079884411 is a deficient number, since it is larger than the sum of its proper divisors (28880946309).

81079884411 is a wasteful number, since it uses less digits than its factorization.

81079884411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91746.

The product of its (nonzero) digits is 516096, while the sum is 51.

The spelling of 81079884411 in words is "eighty-one billion, seventy-nine million, eight hundred eighty-four thousand, four hundred eleven".