81474175433 has 16 divisors (see below), whose sum is σ = 94254720000. Its totient is φ = 68984028432.

The previous prime is 81474175411. The next prime is 81474175459. The reversal of 81474175433 is 33457147418.

It is a cyclic number.

It is not a de Polignac number, because 81474175433 - 2³² = 77179208137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81474175403) 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, 16763 + ... + 404016.

It is an arithmetic number, because the mean of its divisors is an integer number (5890920000).

Almost surely, 2^81474175433 is an apocalyptic number.

It is an amenable number.

81474175433 is a deficient number, since it is larger than the sum of its proper divisors (12780544567).

81474175433 is a wasteful number, since it uses less digits than its factorization.

81474175433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421124.

The product of its digits is 1128960, while the sum is 47.

The spelling of 81474175433 in words is "eighty-one billion, four hundred seventy-four million, one hundred seventy-five thousand, four hundred thirty-three".