16423643629 has 2 divisors, whose sum is σ = 16423643630. Its totient is φ = 16423643628.

The previous prime is 16423643623. The next prime is 16423643647. The reversal of 16423643629 is 92634632461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16358921604 + 64722025 = 127902^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 16423643629 - 2¹¹ = 16423641581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16423643623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8211821814 + 8211821815.

It is an arithmetic number, because the mean of its divisors is an integer number (8211821815).

Almost surely, 2^16423643629 is an apocalyptic number.

It is an amenable number.

16423643629 is a deficient number, since it is larger than the sum of its proper divisors (1).

16423643629 is an equidigital number, since it uses as much as digits as its factorization.

16423643629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 46.

The spelling of 16423643629 in words is "sixteen billion, four hundred twenty-three million, six hundred forty-three thousand, six hundred twenty-nine".