81116196315 has 64 divisors (see below), whose sum is σ = 164553707520. Its totient is φ = 33139232640.

The previous prime is 81116196307. The next prime is 81116196319. The reversal of 81116196315 is 51369161118.

It is not a de Polignac number, because 81116196315 - 2³ = 81116196307 is a prime.

It is a super-2 number, since 2×81116196315² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81116196319) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 527029 + ... + 663318.

It is an arithmetic number, because the mean of its divisors is an integer number (2571151680).

Almost surely, 2^81116196315 is an apocalyptic number.

81116196315 is an abundant number, since it is smaller than the sum of its proper divisors (83437511205).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81116196315 is a wasteful number, since it uses less digits than its factorization.

81116196315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190432.

The product of its digits is 38880, while the sum is 42.

The spelling of 81116196315 in words is "eighty-one billion, one hundred sixteen million, one hundred ninety-six thousand, three hundred fifteen".