81293714913 has 8 divisors (see below), whose sum is σ = 108426973408. Its totient is φ = 54178133184.

The previous prime is 81293714899. The next prime is 81293714939. The reversal of 81293714913 is 31941739218.

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

It is not a de Polignac number, because 81293714913 - 2¹⁴ = 81293698529 is a prime.

It is a super-2 number, since 2×81293714913² (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 (81293714813) 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, 4408456 + ... + 4426857.

It is an arithmetic number, because the mean of its divisors is an integer number (13553371676).

Almost surely, 2^81293714913 is an apocalyptic number.

It is an amenable number.

81293714913 is a deficient number, since it is larger than the sum of its proper divisors (27133258495).

81293714913 is a wasteful number, since it uses less digits than its factorization.

81293714913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8838383.

The product of its digits is 326592, while the sum is 48.

The spelling of 81293714913 in words is "eighty-one billion, two hundred ninety-three million, seven hundred fourteen thousand, nine hundred thirteen".