81837004192 has 24 divisors (see below), whose sum is σ = 164863502496. Its totient is φ = 39966908352.

The previous prime is 81837004159. The next prime is 81837004247. The reversal of 81837004192 is 29140073818.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 29735908 + ... + 29738659.

It is an arithmetic number, because the mean of its divisors is an integer number (6869312604).

Almost surely, 2^81837004192 is an apocalyptic number.

It is an amenable number.

81837004192 is an abundant number, since it is smaller than the sum of its proper divisors (83026498304).

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

81837004192 is a wasteful number, since it uses less digits than its factorization.

81837004192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59474620 (or 59474612 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 81837004192 in words is "eighty-one billion, eight hundred thirty-seven million, four thousand, one hundred ninety-two".