81076341831 has 4 divisors (see below), whose sum is σ = 108101789112. Its totient is φ = 54050894552.

The previous prime is 81076341823. The next prime is 81076341833. The reversal of 81076341831 is 13814367018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81076341831 - 2³ = 81076341823 is a prime.

It is a super-2 number, since 2×81076341831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81076341833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13512723636 + ... + 13512723641.

It is an arithmetic number, because the mean of its divisors is an integer number (27025447278).

Almost surely, 2^81076341831 is an apocalyptic number.

81076341831 is a deficient number, since it is larger than the sum of its proper divisors (27025447281).

81076341831 is a wasteful number, since it uses less digits than its factorization.

81076341831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27025447280.

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 81076341831 in words is "eighty-one billion, seventy-six million, three hundred forty-one thousand, eight hundred thirty-one".