16512168389 has 2 divisors, whose sum is σ = 16512168390. Its totient is φ = 16512168388.

The previous prime is 16512168373. The next prime is 16512168401. The reversal of 16512168389 is 98386121561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15683304289 + 828864100 = 125233^2 + 28790^2 .

It is a cyclic number.

It is not a de Polignac number, because 16512168389 - 2⁴ = 16512168373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16512168319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256084194 + 8256084195.

It is an arithmetic number, because the mean of its divisors is an integer number (8256084195).

Almost surely, 2^16512168389 is an apocalyptic number.

It is an amenable number.

16512168389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16512168389 is an equidigital number, since it uses as much as digits as its factorization.

16512168389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The spelling of 16512168389 in words is "sixteen billion, five hundred twelve million, one hundred sixty-eight thousand, three hundred eighty-nine".