6450235571257 has 2 divisors, whose sum is σ = 6450235571258. Its totient is φ = 6450235571256.

The previous prime is 6450235571209. The next prime is 6450235571267. The reversal of 6450235571257 is 7521755320546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4451133672441 + 1999101898816 = 2109771^2 + 1413896^2 .

It is a cyclic number.

It is not a de Polignac number, because 6450235571257 - 2¹⁵ = 6450235538489 is a prime.

It is not a weakly prime, because it can be changed into another prime (6450235571267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225117785628 + 3225117785629.

It is an arithmetic number, because the mean of its divisors is an integer number (3225117785629).

Almost surely, 2^{6450235571257} is an apocalyptic number.

It is an amenable number.

6450235571257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6450235571257 is an equidigital number, since it uses as much as digits as its factorization.

6450235571257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820000, while the sum is 52.

The spelling of 6450235571257 in words is "six trillion, four hundred fifty billion, two hundred thirty-five million, five hundred seventy-one thousand, two hundred fifty-seven".