16405706407 has 2 divisors, whose sum is σ = 16405706408. Its totient is φ = 16405706406.

The previous prime is 16405706341. The next prime is 16405706419. The reversal of 16405706407 is 70460750461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16405706407 - 2¹⁹ = 16405182119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16405706407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16405706467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202853203 + 8202853204.

It is an arithmetic number, because the mean of its divisors is an integer number (8202853204).

Almost surely, 2^16405706407 is an apocalyptic number.

16405706407 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405706407 is an equidigital number, since it uses as much as digits as its factorization.

16405706407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 16405706407 in words is "sixteen billion, four hundred five million, seven hundred six thousand, four hundred seven".