81392110833 has 48 divisors (see below), whose sum is σ = 128235663360. Its totient is φ = 45737825760.

The previous prime is 81392110801. The next prime is 81392110847. The reversal of 81392110833 is 33801129318.

It is not a de Polignac number, because 81392110833 - 2⁵ = 81392110801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81392110791 and 81392110800.

It is not an unprimeable number, because it can be changed into a prime (81392118833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198616 + ... + 449702.

It is an arithmetic number, because the mean of its divisors is an integer number (2671576320).

Almost surely, 2^81392110833 is an apocalyptic number.

It is an amenable number.

81392110833 is a deficient number, since it is larger than the sum of its proper divisors (46843552527).

81392110833 is a wasteful number, since it uses less digits than its factorization.

81392110833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251178 (or 251167 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 81392110833 in words is "eighty-one billion, three hundred ninety-two million, one hundred ten thousand, eight hundred thirty-three".