681033433499 has 4 divisors (see below), whose sum is σ = 716877298440. Its totient is φ = 645189568560.

The previous prime is 681033433477. The next prime is 681033433501. The reversal of 681033433499 is 994334330186.

It is a happy number.

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 681033433499 - 2²⁴ = 681016656283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681033433499.

It is not an unprimeable number, because it can be changed into a prime (681033433439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17921932442 + ... + 17921932479.

It is an arithmetic number, because the mean of its divisors is an integer number (179219324610).

Almost surely, 2^681033433499 is an apocalyptic number.

681033433499 is a deficient number, since it is larger than the sum of its proper divisors (35843864941).

681033433499 is a wasteful number, since it uses less digits than its factorization.

681033433499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35843864940.

The product of its (nonzero) digits is 5038848, while the sum is 53.

The spelling of 681033433499 in words is "six hundred eighty-one billion, thirty-three million, four hundred thirty-three thousand, four hundred ninety-nine".