81831466534 has 8 divisors (see below), whose sum is σ = 123287937048. Its totient is φ = 40735487520.

The previous prime is 81831466513. The next prime is 81831466553. The reversal of 81831466534 is 43566413818.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90122307 + ... + 90123214.

It is an arithmetic number, because the mean of its divisors is an integer number (15410992131).

Almost surely, 2^81831466534 is an apocalyptic number.

81831466534 is a deficient number, since it is larger than the sum of its proper divisors (41456470514).

81831466534 is a wasteful number, since it uses less digits than its factorization.

81831466534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180245750.

The product of its digits is 1658880, while the sum is 49.

The spelling of 81831466534 in words is "eighty-one billion, eight hundred thirty-one million, four hundred sixty-six thousand, five hundred thirty-four".