81074227434 has 64 divisors (see below), whose sum is σ = 173721977856. Its totient is φ = 25135202304.

The previous prime is 81074227391. The next prime is 81074227441. The reversal of 81074227434 is 43472247018.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3103194 + ... + 3129210.

It is an arithmetic number, because the mean of its divisors is an integer number (2714405904).

Almost surely, 2^81074227434 is an apocalyptic number.

81074227434 is an abundant number, since it is smaller than the sum of its proper divisors (92647750422).

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

81074227434 is a wasteful number, since it uses less digits than its factorization.

81074227434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26399.

The product of its (nonzero) digits is 301056, while the sum is 42.

The spelling of 81074227434 in words is "eighty-one billion, seventy-four million, two hundred twenty-seven thousand, four hundred thirty-four".