81074845093 has 8 divisors (see below), whose sum is σ = 88450703136. Its totient is φ = 73699890000.

The previous prime is 81074845087. The next prime is 81074845097. The reversal of 81074845093 is 39054847018.

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

It is a de Polignac number, because none of the positive numbers 2^k-81074845093 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 (81074845097) 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, 30658 + ... + 403843.

It is an arithmetic number, because the mean of its divisors is an integer number (11056337892).

Almost surely, 2^81074845093 is an apocalyptic number.

It is an amenable number.

81074845093 is a deficient number, since it is larger than the sum of its proper divisors (7375858043).

81074845093 is a wasteful number, since it uses less digits than its factorization.

81074845093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451475.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 81074845093 in words is "eighty-one billion, seventy-four million, eight hundred forty-five thousand, ninety-three".