6457571917 has 2 divisors, whose sum is σ = 6457571918. Its totient is φ = 6457571916.

The previous prime is 6457571849. The next prime is 6457571969. The reversal of 6457571917 is 7191757546.

It is an a-pointer prime, because the next prime (6457571969) can be obtained adding 6457571917 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3376655881 + 3080916036 = 58109^2 + 55506^2 .

It is a cyclic number.

It is not a de Polignac number, because 6457571917 - 2¹⁵ = 6457539149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6457571987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228785958 + 3228785959.

It is an arithmetic number, because the mean of its divisors is an integer number (3228785959).

Almost surely, 2^6457571917 is an apocalyptic number.

It is an amenable number.

6457571917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6457571917 is an equidigital number, since it uses as much as digits as its factorization.

6457571917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 52.

The square root of 6457571917 is about 80359.0188902279. The cubic root of 6457571917 is about 1862.1861139252.

The spelling of 6457571917 in words is "six billion, four hundred fifty-seven million, five hundred seventy-one thousand, nine hundred seventeen".