81804593192 has 16 divisors (see below), whose sum is σ = 175295556960. Its totient is φ = 35059111344.

The previous prime is 81804593179. The next prime is 81804593207. The reversal of 81804593192 is 29139540818.

It is a super-2 number, since 2×81804593192² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81804593192.

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, 730398098 + ... + 730398209.

It is an arithmetic number, because the mean of its divisors is an integer number (10955972310).

Almost surely, 2^81804593192 is an apocalyptic number.

It is an amenable number.

81804593192 is an abundant number, since it is smaller than the sum of its proper divisors (93490963768).

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

81804593192 is a wasteful number, since it uses less digits than its factorization.

81804593192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460796320 (or 1460796316 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 81804593192 in words is "eighty-one billion, eight hundred four million, five hundred ninety-three thousand, one hundred ninety-two".