81804583204 has 24 divisors (see below), whose sum is σ = 144906941088. Its totient is φ = 40402764480.

The previous prime is 81804583199. The next prime is 81804583261. The reversal of 81804583204 is 40238540818.

It is a happy 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, 2409064 + ... + 2442784.

It is an arithmetic number, because the mean of its divisors is an integer number (6037789212).

Almost surely, 2^81804583204 is an apocalyptic number.

It is an amenable number.

81804583204 is a deficient number, since it is larger than the sum of its proper divisors (63102357884).

81804583204 is a wasteful number, since it uses less digits than its factorization.

81804583204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41115 (or 41113 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 81804583204 in words is "eighty-one billion, eight hundred four million, five hundred eighty-three thousand, two hundred four".