81094687045631 has 8 divisors (see below), whose sum is σ = 93197405704320. Its totient is φ = 69121409228568.

The previous prime is 81094687045613. The next prime is 81094687045643. The reversal of 81094687045631 is 13654078649018.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81094687045631 is a prime.

It is a super-2 number, since 2×81094687045631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81094687045601) 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, 32360209061 + ... + 32360211566.

It is an arithmetic number, because the mean of its divisors is an integer number (11649675713040).

Almost surely, 2^{81094687045631} is an apocalyptic number.

81094687045631 is a deficient number, since it is larger than the sum of its proper divisors (12102718658689).

81094687045631 is a wasteful number, since it uses less digits than its factorization.

81094687045631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64720420813.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 81094687045631 in words is "eighty-one trillion, ninety-four billion, six hundred eighty-seven million, forty-five thousand, six hundred thirty-one".