81794372351 has 8 divisors (see below), whose sum is σ = 82009703664. Its totient is φ = 81579290560.

The previous prime is 81794372333. The next prime is 81794372393. The reversal of 81794372351 is 15327349718.

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 81794372351 - 2¹⁸ = 81794110207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81794372351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81794372551) 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, 603395 + ... + 726411.

It is an arithmetic number, because the mean of its divisors is an integer number (10251212958).

Almost surely, 2^81794372351 is an apocalyptic number.

81794372351 is a deficient number, since it is larger than the sum of its proper divisors (215331313).

81794372351 is a wasteful number, since it uses less digits than its factorization.

81794372351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124761.

The product of its digits is 1270080, while the sum is 50.

The spelling of 81794372351 in words is "eighty-one billion, seven hundred ninety-four million, three hundred seventy-two thousand, three hundred fifty-one".