81474133415 has 8 divisors (see below), whose sum is σ = 102914694960. Its totient is φ = 61748816832.

The previous prime is 81474133337. The next prime is 81474133423. The reversal of 81474133415 is 51433147418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-81474133415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428811134 + ... + 428811323.

It is an arithmetic number, because the mean of its divisors is an integer number (12864336870).

Almost surely, 2^81474133415 is an apocalyptic number.

81474133415 is a deficient number, since it is larger than the sum of its proper divisors (21440561545).

81474133415 is a wasteful number, since it uses less digits than its factorization.

81474133415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857622481.

The product of its digits is 161280, while the sum is 41.

The spelling of 81474133415 in words is "eighty-one billion, four hundred seventy-four million, one hundred thirty-three thousand, four hundred fifteen".