81824045357 has 8 divisors (see below), whose sum is σ = 86138239200. Its totient is φ = 77510618064.

The previous prime is 81824045341. The next prime is 81824045371. The reversal of 81824045357 is 75354042818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81824045357 - 2⁴ = 81824045341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81824045327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34319 + ... + 405987.

It is an arithmetic number, because the mean of its divisors is an integer number (10767279900).

Almost surely, 2^81824045357 is an apocalyptic number.

It is an amenable number.

81824045357 is a deficient number, since it is larger than the sum of its proper divisors (4314193843).

81824045357 is a wasteful number, since it uses less digits than its factorization.

81824045357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383275.

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 81824045357 in words is "eighty-one billion, eight hundred twenty-four million, forty-five thousand, three hundred fifty-seven".