81346373709 has 8 divisors (see below), whose sum is σ = 108612685440. Its totient is φ = 54155488896.

The previous prime is 81346373659. The next prime is 81346373783. The reversal of 81346373709 is 90737364318.

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

It is not a de Polignac number, because 81346373709 - 2¹⁹ = 81345849421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81346373509) 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, 18854212 + ... + 18858525.

It is an arithmetic number, because the mean of its divisors is an integer number (13576585680).

Almost surely, 2^81346373709 is an apocalyptic number.

It is an amenable number.

81346373709 is a deficient number, since it is larger than the sum of its proper divisors (27266311731).

81346373709 is a wasteful number, since it uses less digits than its factorization.

81346373709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37713459.

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 81346373709 in words is "eighty-one billion, three hundred forty-six million, three hundred seventy-three thousand, seven hundred nine".