81087079393 has 8 divisors (see below), whose sum is σ = 84725289216. Its totient is φ = 77458260000.

The previous prime is 81087079391. The next prime is 81087079421. The reversal of 81087079393 is 39397078018.

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 81087079393 - 2¹ = 81087079391 is a prime.

It is a super-2 number, since 2×81087079393² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81087079391) 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, 2329948 + ... + 2364493.

It is an arithmetic number, because the mean of its divisors is an integer number (10590661152).

Almost surely, 2^81087079393 is an apocalyptic number.

It is an amenable number.

81087079393 is a deficient number, since it is larger than the sum of its proper divisors (3638209823).

81087079393 is a wasteful number, since it uses less digits than its factorization.

81087079393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695215.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 81087079393 in words is "eighty-one billion, eighty-seven million, seventy-nine thousand, three hundred ninety-three".