16570518197 has 2 divisors, whose sum is σ = 16570518198. Its totient is φ = 16570518196.

The previous prime is 16570518193. The next prime is 16570518233. The reversal of 16570518197 is 79181507561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16141448401 + 429069796 = 127049^2 + 20714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16570518197 - 2² = 16570518193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16570518193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8285259098 + 8285259099.

It is an arithmetic number, because the mean of its divisors is an integer number (8285259099).

Almost surely, 2^16570518197 is an apocalyptic number.

It is an amenable number.

16570518197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16570518197 is an equidigital number, since it uses as much as digits as its factorization.

16570518197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 50.

The spelling of 16570518197 in words is "sixteen billion, five hundred seventy million, five hundred eighteen thousand, one hundred ninety-seven".