16905825613 has 2 divisors, whose sum is σ = 16905825614. Its totient is φ = 16905825612.

The previous prime is 16905825583. The next prime is 16905825641. The reversal of 16905825613 is 31652850961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14782182724 + 2123642889 = 121582^2 + 46083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16905825613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16905825683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8452912806 + 8452912807.

It is an arithmetic number, because the mean of its divisors is an integer number (8452912807).

Almost surely, 2^16905825613 is an apocalyptic number.

It is an amenable number.

16905825613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16905825613 is an equidigital number, since it uses as much as digits as its factorization.

16905825613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 16905825613 in words is "sixteen billion, nine hundred five million, eight hundred twenty-five thousand, six hundred thirteen".