16203315643 has 2 divisors, whose sum is σ = 16203315644. Its totient is φ = 16203315642.

The previous prime is 16203315607. The next prime is 16203315677. The reversal of 16203315643 is 34651330261.

It is an a-pointer prime, because the next prime (16203315677) can be obtained adding 16203315643 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16203315643 - 2²⁵ = 16169761211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16203315599 and 16203315608.

It is not a weakly prime, because it can be changed into another prime (16203315683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8101657821 + 8101657822.

It is an arithmetic number, because the mean of its divisors is an integer number (8101657822).

Almost surely, 2^16203315643 is an apocalyptic number.

16203315643 is a deficient number, since it is larger than the sum of its proper divisors (1).

16203315643 is an equidigital number, since it uses as much as digits as its factorization.

16203315643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 16203315643 in words is "sixteen billion, two hundred three million, three hundred fifteen thousand, six hundred forty-three".