16899621439 has 2 divisors, whose sum is σ = 16899621440. Its totient is φ = 16899621438.

The previous prime is 16899621391. The next prime is 16899621481. The reversal of 16899621439 is 93412699861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16899621439 - 2¹¹ = 16899619391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16899621539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8449810719 + 8449810720.

It is an arithmetic number, because the mean of its divisors is an integer number (8449810720).

Almost surely, 2^16899621439 is an apocalyptic number.

16899621439 is a deficient number, since it is larger than the sum of its proper divisors (1).

16899621439 is an equidigital number, since it uses as much as digits as its factorization.

16899621439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The spelling of 16899621439 in words is "sixteen billion, eight hundred ninety-nine million, six hundred twenty-one thousand, four hundred thirty-nine".