81433333333417 has 24 divisors (see below), whose sum is σ = 89638398911448. Its totient is φ = 73925772710400.

The previous prime is 81433333333399. The next prime is 81433333333421. The reversal of 81433333333417 is 71433333333418.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 72058095599616 + 9375237733801 = 8488704^2 + 3061901^2 .

It is a de Polignac number, because none of the positive numbers 2^k-81433333333417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81433333333117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67992117 + ... + 69179437.

It is an arithmetic number, because the mean of its divisors is an integer number (3734933287977).

Almost surely, 2^{81433333333417} is an apocalyptic number.

It is an amenable number.

81433333333417 is a deficient number, since it is larger than the sum of its proper divisors (8205065578031).

81433333333417 is a wasteful number, since it uses less digits than its factorization.

81433333333417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194061 (or 1194048 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 49.

Subtracting from 81433333333417 its reverse (71433333333418), we obtain a palindrome (9999999999999).

The spelling of 81433333333417 in words is "eighty-one trillion, four hundred thirty-three billion, three hundred thirty-three million, three hundred thirty-three thousand, four hundred seventeen".