16657457201797 has 2 divisors, whose sum is σ = 16657457201798. Its totient is φ = 16657457201796.

The previous prime is 16657457201677. The next prime is 16657457201807. The reversal of 16657457201797 is 79710275475661.

16657457201797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13349954830081 + 3307502371716 = 3653759^2 + 1818654^2 .

It is a cyclic number.

It is not a de Polignac number, because 16657457201797 - 2¹⁵ = 16657457169029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16657457201197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328728600898 + 8328728600899.

It is an arithmetic number, because the mean of its divisors is an integer number (8328728600899).

Almost surely, 2^{16657457201797} is an apocalyptic number.

It is an amenable number.

16657457201797 is a deficient number, since it is larger than the sum of its proper divisors (1).

16657457201797 is an equidigital number, since it uses as much as digits as its factorization.

16657457201797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155584800, while the sum is 67.

The spelling of 16657457201797 in words is "sixteen trillion, six hundred fifty-seven billion, four hundred fifty-seven million, two hundred one thousand, seven hundred ninety-seven".