16610857201 has 2 divisors, whose sum is σ = 16610857202. Its totient is φ = 16610857200.

The previous prime is 16610857157. The next prime is 16610857229. The reversal of 16610857201 is 10275801661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16454732176 + 156125025 = 128276^2 + 12495^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610857201 - 2¹⁹ = 16610332913 is a prime.

It is not a weakly prime, because it can be changed into another prime (16610857231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305428600 + 8305428601.

It is an arithmetic number, because the mean of its divisors is an integer number (8305428601).

Almost surely, 2^16610857201 is an apocalyptic number.

It is an amenable number.

16610857201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16610857201 is an equidigital number, since it uses as much as digits as its factorization.

16610857201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 16610857201 in words is "sixteen billion, six hundred ten million, eight hundred fifty-seven thousand, two hundred one".