81174434286 has 32 divisors (see below), whose sum is σ = 178933724928. Its totient is φ = 24344720640.

The previous prime is 81174434269. The next prime is 81174434287. The reversal of 81174434286 is 68243447118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81174434287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6333370 + ... + 6346173.

It is an arithmetic number, because the mean of its divisors is an integer number (5591678904).

Almost surely, 2^81174434286 is an apocalyptic number.

81174434286 is an abundant number, since it is smaller than the sum of its proper divisors (97759290642).

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

81174434286 is a wasteful number, since it uses less digits than its factorization.

81174434286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12679656.

The product of its digits is 1032192, while the sum is 48.

The spelling of 81174434286 in words is "eighty-one billion, one hundred seventy-four million, four hundred thirty-four thousand, two hundred eighty-six".