81824345458 has 8 divisors (see below), whose sum is σ = 122741248752. Its totient is φ = 40910595876.

The previous prime is 81824345453. The next prime is 81824345483. The reversal of 81824345458 is 85454342818.

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

It is not an unprimeable number, because it can be changed into a prime (81824345453) 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, 722460 + ... + 828007.

It is an arithmetic number, because the mean of its divisors is an integer number (15342656094).

Almost surely, 2^81824345458 is an apocalyptic number.

81824345458 is a deficient number, since it is larger than the sum of its proper divisors (40916903294).

81824345458 is a wasteful number, since it uses less digits than its factorization.

81824345458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576856.

The product of its digits is 4915200, while the sum is 52.

The spelling of 81824345458 in words is "eighty-one billion, eight hundred twenty-four million, three hundred forty-five thousand, four hundred fifty-eight".