81833165802 has 48 divisors (see below), whose sum is σ = 183057239040. Its totient is φ = 26393104800.

The previous prime is 81833165773. The next prime is 81833165809. The reversal of 81833165802 is 20856133818.

It is not an unprimeable number, because it can be changed into a prime (81833165809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4578399 + ... + 4596237.

It is an arithmetic number, because the mean of its divisors is an integer number (3813692480).

Almost surely, 2^81833165802 is an apocalyptic number.

81833165802 is an abundant number, since it is smaller than the sum of its proper divisors (101224073238).

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

81833165802 is a wasteful number, since it uses less digits than its factorization.

81833165802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26099 (or 26096 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 81833165802 in words is "eighty-one billion, eight hundred thirty-three million, one hundred sixty-five thousand, eight hundred two".