81046026244431 has 12 divisors (see below), whose sum is σ = 122156329412208. Its totient is φ = 51681523981824.

The previous prime is 81046026244411. The next prime is 81046026244433. The reversal of 81046026244431 is 13444262064018.

It is a happy number.

81046026244431 is a `hidden beast` number, since 8 + 1 + 0 + 4 + 602 + 6 + 2 + 4 + 4 + 4 + 31 = 666.

It is not a de Polignac number, because 81046026244431 - 2⁷ = 81046026244303 is a prime.

It is a super-2 number, since 2×81046026244431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046026244433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195763348210 + ... + 195763348623.

It is an arithmetic number, because the mean of its divisors is an integer number (10179694117684).

Almost surely, 2^{81046026244431} is an apocalyptic number.

81046026244431 is a deficient number, since it is larger than the sum of its proper divisors (41110303167777).

81046026244431 is a wasteful number, since it uses less digits than its factorization.

81046026244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391526696862 (or 391526696859 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 81046026244431 in words is "eighty-one trillion, forty-six billion, twenty-six million, two hundred forty-four thousand, four hundred thirty-one".