6550497647257 has 2 divisors, whose sum is σ = 6550497647258. Its totient is φ = 6550497647256.

The previous prime is 6550497647233. The next prime is 6550497647297. The reversal of 6550497647257 is 7527467940556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3436440967696 + 3114056679561 = 1853764^2 + 1764669^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550497647257 - 2⁷ = 6550497647129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6550497647192 and 6550497647201.

It is not a weakly prime, because it can be changed into another prime (6550497647297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275248823628 + 3275248823629.

It is an arithmetic number, because the mean of its divisors is an integer number (3275248823629).

Almost surely, 2^{6550497647257} is an apocalyptic number.

It is an amenable number.

6550497647257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550497647257 is an equidigital number, since it uses as much as digits as its factorization.

6550497647257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528000, while the sum is 67.

The spelling of 6550497647257 in words is "six trillion, five hundred fifty billion, four hundred ninety-seven million, six hundred forty-seven thousand, two hundred fifty-seven".