81195726 has 16 divisors (see below), whose sum is σ = 164448000. Its totient is φ = 26722488.

The previous prime is 81195713. The next prime is 81195749. The reversal of 81195726 is 62759118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85176 + ... + 86123.

It is an arithmetic number, because the mean of its divisors is an integer number (10278000).

Almost surely, 2^81195726 is an apocalyptic number.

81195726 is an abundant number, since it is smaller than the sum of its proper divisors (83252274).

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

81195726 is a wasteful number, since it uses less digits than its factorization.

81195726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171383.

The product of its digits is 30240, while the sum is 39.

The square root of 81195726 is about 9010.8671058894. The cubic root of 81195726 is about 433.0230916788.

The spelling of 81195726 in words is "eighty-one million, one hundred ninety-five thousand, seven hundred twenty-six".