16506205259 has 2 divisors, whose sum is σ = 16506205260. Its totient is φ = 16506205258.

The previous prime is 16506205241. The next prime is 16506205319. The reversal of 16506205259 is 95250260561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16506205259 is a prime.

It is not a weakly prime, because it can be changed into another prime (16506205229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253102629 + 8253102630.

It is an arithmetic number, because the mean of its divisors is an integer number (8253102630).

Almost surely, 2^16506205259 is an apocalyptic number.

16506205259 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506205259 is an equidigital number, since it uses as much as digits as its factorization.

16506205259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 16506205259 in words is "sixteen billion, five hundred six million, two hundred five thousand, two hundred fifty-nine".