81417388033 has 8 divisors (see below), whose sum is σ = 81593247680. Its totient is φ = 81241688880.

The previous prime is 81417388021. The next prime is 81417388043. The reversal of 81417388033 is 33088371418.

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 81417388033 - 2⁵ = 81417388001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81417388043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004716 + ... + 1082722.

It is an arithmetic number, because the mean of its divisors is an integer number (10199155960).

Almost surely, 2^81417388033 is an apocalyptic number.

It is an amenable number.

81417388033 is a deficient number, since it is larger than the sum of its proper divisors (175859647).

81417388033 is a wasteful number, since it uses less digits than its factorization.

81417388033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80247.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 81417388033 in words is "eighty-one billion, four hundred seventeen million, three hundred eighty-eight thousand, thirty-three".