81796176 has 160 divisors (see below), whose sum is σ = 292838400. Its totient is φ = 21237120.

The previous prime is 81796151. The next prime is 81796199. The reversal of 81796176 is 67169718.

It is a super-2 number, since 2×81796176² = 13381228816445952, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32035 + ... + 34493.

It is an arithmetic number, because the mean of its divisors is an integer number (1830240).

Almost surely, 2^81796176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81796176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146419200).

81796176 is an abundant number, since it is smaller than the sum of its proper divisors (211042224).

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

81796176 is a wasteful number, since it uses less digits than its factorization.

81796176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494 (or 2482 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 81796176 is about 9044.1238381614. The cubic root of 81796176 is about 434.0878866660.

The spelling of 81796176 in words is "eighty-one million, seven hundred ninety-six thousand, one hundred seventy-six".