81334673334 has 48 divisors (see below), whose sum is σ = 180334674000. Its totient is φ = 26483790528.

The previous prime is 81334673293. The next prime is 81334673347. The reversal of 81334673334 is 43337643318.

It is a self number, because there is not a number n which added to its sum of digits gives 81334673334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32317 + ... + 404615.

It is an arithmetic number, because the mean of its divisors is an integer number (3756972375).

Almost surely, 2^81334673334 is an apocalyptic number.

81334673334 is an abundant number, since it is smaller than the sum of its proper divisors (99000000666).

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

81334673334 is a wasteful number, since it uses less digits than its factorization.

81334673334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372589 (or 372586 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 45.

The spelling of 81334673334 in words is "eighty-one billion, three hundred thirty-four million, six hundred seventy-three thousand, three hundred thirty-four".