81825919883 has 4 divisors (see below), whose sum is σ = 81832827000. Its totient is φ = 81819012768.

The previous prime is 81825919841. The next prime is 81825919891. The reversal of 81825919883 is 38891952818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81825919883 - 2⁸ = 81825919627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81825919283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3435758 + ... + 3459491.

It is an arithmetic number, because the mean of its divisors is an integer number (20458206750).

Almost surely, 2^81825919883 is an apocalyptic number.

81825919883 is a deficient number, since it is larger than the sum of its proper divisors (6907117).

81825919883 is a wasteful number, since it uses less digits than its factorization.

81825919883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907116.

The product of its digits is 9953280, while the sum is 62.

The spelling of 81825919883 in words is "eighty-one billion, eight hundred twenty-five million, nine hundred nineteen thousand, eight hundred eighty-three".