81819700296 has 64 divisors (see below), whose sum is σ = 205890984000. Its totient is φ = 27094867968.

The previous prime is 81819700229. The next prime is 81819700297. The reversal of 81819700296 is 69200791818.

It is not an unprimeable number, because it can be changed into a prime (81819700297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2494515 + ... + 2527101.

It is an arithmetic number, because the mean of its divisors is an integer number (3217046625).

Almost surely, 2^81819700296 is an apocalyptic number.

It is an amenable number.

81819700296 is an abundant number, since it is smaller than the sum of its proper divisors (124071283704).

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

81819700296 is a wasteful number, since it uses less digits than its factorization.

81819700296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33278 (or 33274 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 51.

The spelling of 81819700296 in words is "eighty-one billion, eight hundred nineteen million, seven hundred thousand, two hundred ninety-six".