81314717295 has 32 divisors (see below), whose sum is σ = 148760017920. Its totient is φ = 37154880000.

The previous prime is 81314717269. The next prime is 81314717317. The reversal of 81314717295 is 59271741318.

It is not a de Polignac number, because 81314717295 - 2⁸ = 81314717039 is a prime.

It is a super-2 number, since 2×81314717295² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41670 + ... + 405420.

It is an arithmetic number, because the mean of its divisors is an integer number (4648750560).

Almost surely, 2^81314717295 is an apocalyptic number.

81314717295 is a deficient number, since it is larger than the sum of its proper divisors (67445300625).

81314717295 is a wasteful number, since it uses less digits than its factorization.

81314717295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365895.

The product of its digits is 423360, while the sum is 48.

The spelling of 81314717295 in words is "eighty-one billion, three hundred fourteen million, seven hundred seventeen thousand, two hundred ninety-five".