81794656 has 24 divisors (see below), whose sum is σ = 163677024. Its totient is φ = 40225920.

The previous prime is 81794653. The next prime is 81794659. The reversal of 81794656 is 65649718.

It is an interprime number because it is at equal distance from previous prime (81794653) and next prime (81794659).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81794653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19000 + ... + 22903.

It is an arithmetic number, because the mean of its divisors is an integer number (6819876).

Almost surely, 2^81794656 is an apocalyptic number.

It is an amenable number.

81794656 is an abundant number, since it is smaller than the sum of its proper divisors (81882368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81794656 is a wasteful number, since it uses less digits than its factorization.

81794656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41974 (or 41966 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 81794656 is about 9044.0398053082. The cubic root of 81794656 is about 434.0851977967.

The spelling of 81794656 in words is "eighty-one million, seven hundred ninety-four thousand, six hundred fifty-six".