81596000 has 48 divisors (see below), whose sum is σ = 200491200. Its totient is φ = 32636800.

The previous prime is 81595993. The next prime is 81596003. The reversal of 81596000 is 69518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81596003) 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, 6200 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (4176900).

Almost surely, 2^81596000 is an apocalyptic number.

81596000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81596000 is an abundant number, since it is smaller than the sum of its proper divisors (118895200).

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

81596000 is a wasteful number, since it uses less digits than its factorization.

81596000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20424 (or 20406 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 81596000 is about 9033.0504260742. The cubic root of 81596000 is about 433.7334896699.

The spelling of 81596000 in words is "eighty-one million, five hundred ninety-six thousand".