81844358202 has 16 divisors (see below), whose sum is σ = 181876351680. Its totient is φ = 27281452716.

The previous prime is 81844358191. The next prime is 81844358227. The reversal of 81844358202 is 20285344818.

81844358202 is a `hidden beast` number, since 8 + 1 + 8 + 4 + 435 + 8 + 202 = 666.

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, 757818078 + ... + 757818185.

It is an arithmetic number, because the mean of its divisors is an integer number (11367271980).

Almost surely, 2^81844358202 is an apocalyptic number.

81844358202 is an abundant number, since it is smaller than the sum of its proper divisors (100031993478).

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

81844358202 is a wasteful number, since it uses less digits than its factorization.

81844358202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515636274 (or 1515636268 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The spelling of 81844358202 in words is "eighty-one billion, eight hundred forty-four million, three hundred fifty-eight thousand, two hundred two".