6542215697 has 2 divisors, whose sum is σ = 6542215698. Its totient is φ = 6542215696.

The previous prime is 6542215661. The next prime is 6542215699. The reversal of 6542215697 is 7965122456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6096330241 + 445885456 = 78079^2 + 21116^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542215697 - 2¹⁸ = 6541953553 is a prime.

Together with 6542215699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6542215699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271107848 + 3271107849.

It is an arithmetic number, because the mean of its divisors is an integer number (3271107849).

Almost surely, 2^6542215697 is an apocalyptic number.

It is an amenable number.

6542215697 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542215697 is an equidigital number, since it uses as much as digits as its factorization.

6542215697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 6542215697 is about 80883.9643996262. The cubic root of 6542215697 is about 1870.2871337904.

The spelling of 6542215697 in words is "six billion, five hundred forty-two million, two hundred fifteen thousand, six hundred ninety-seven".