16906385257 has 2 divisors, whose sum is σ = 16906385258. Its totient is φ = 16906385256.

The previous prime is 16906385227. The next prime is 16906385263. The reversal of 16906385257 is 75258360961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16516362256 + 390023001 = 128516^2 + 19749^2 .

It is a cyclic number.

It is not a de Polignac number, because 16906385257 - 2³¹ = 14758901609 is a prime.

It is not a weakly prime, because it can be changed into another prime (16906385227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8453192628 + 8453192629.

It is an arithmetic number, because the mean of its divisors is an integer number (8453192629).

Almost surely, 2^16906385257 is an apocalyptic number.

It is an amenable number.

16906385257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16906385257 is an equidigital number, since it uses as much as digits as its factorization.

16906385257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 16906385257 in words is "sixteen billion, nine hundred six million, three hundred eighty-five thousand, two hundred fifty-seven".