81682596 has 36 divisors (see below), whose sum is σ = 217344400. Its totient is φ = 25794288.

The previous prime is 81682553. The next prime is 81682597. The reversal of 81682596 is 69528618.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (81682597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59026 + ... + 60393.

Almost surely, 2^81682596 is an apocalyptic number.

It is an amenable number.

81682596 is an abundant number, since it is smaller than the sum of its proper divisors (135661804).

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

81682596 is a wasteful number, since it uses less digits than its factorization.

81682596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119448 (or 119443 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 81682596 is about 9037.8424416450. The cubic root of 81682596 is about 433.8868726219.

The spelling of 81682596 in words is "eighty-one million, six hundred eighty-two thousand, five hundred ninety-six".