81195696 has 200 divisors, whose sum is σ = 253507584. Its totient is φ = 25038720.

The previous prime is 81195677. The next prime is 81195713. The reversal of 81195696 is 69659118.

81195696 is a `hidden beast` number, since 81 + 1 + 9 + 569 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1727545 + ... + 1727591.

Almost surely, 2^81195696 is an apocalyptic number.

81195696 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81195696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126753792).

81195696 is an abundant number, since it is smaller than the sum of its proper divisors (172311888).

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

81195696 is a wasteful number, since it uses less digits than its factorization.

81195696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 126 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 81195696 is about 9010.8654412326. The cubic root of 81195696 is about 433.0230383481.

The spelling of 81195696 in words is "eighty-one million, one hundred ninety-five thousand, six hundred ninety-six".