81896175901 has 8 divisors (see below), whose sum is σ = 82647599264. Its totient is φ = 81147789360.

The previous prime is 81896175899. The next prime is 81896175917. The reversal of 81896175901 is 10957169818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81896175901 - 2¹ = 81896175899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81896175001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705006 + ... + 812911.

It is an arithmetic number, because the mean of its divisors is an integer number (10330949908).

Almost surely, 2^81896175901 is an apocalyptic number.

It is an amenable number.

81896175901 is a deficient number, since it is larger than the sum of its proper divisors (751423363).

81896175901 is a wasteful number, since it uses less digits than its factorization.

81896175901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518411.

The product of its (nonzero) digits is 1088640, while the sum is 55.

The spelling of 81896175901 in words is "eighty-one billion, eight hundred ninety-six million, one hundred seventy-five thousand, nine hundred one".