81804473598 has 8 divisors (see below), whose sum is σ = 163608947208. Its totient is φ = 27268157864.

The previous prime is 81804473587. The next prime is 81804473623. The reversal of 81804473598 is 89537440818.

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

81804473598 is an admirable number.

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, 6817039461 + ... + 6817039472.

It is an arithmetic number, because the mean of its divisors is an integer number (20451118401).

Almost surely, 2^81804473598 is an apocalyptic number.

81804473598 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81804473598 is a wasteful number, since it uses less digits than its factorization.

81804473598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634078938.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 81804473598 in words is "eighty-one billion, eight hundred four million, four hundred seventy-three thousand, five hundred ninety-eight".