6457394937547 has 2 divisors, whose sum is σ = 6457394937548. Its totient is φ = 6457394937546.

The previous prime is 6457394937509. The next prime is 6457394937551. The reversal of 6457394937547 is 7457394937546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6457394937547 - 2¹¹ = 6457394935499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6457394937547.

It is not a weakly prime, because it can be changed into another prime (6457394937047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228697468773 + 3228697468774.

It is an arithmetic number, because the mean of its divisors is an integer number (3228697468774).

Almost surely, 2^{6457394937547} is an apocalyptic number.

6457394937547 is a deficient number, since it is larger than the sum of its proper divisors (1).

6457394937547 is an equidigital number, since it uses as much as digits as its factorization.

6457394937547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400451200, while the sum is 73.

Subtracting 6457394937547 from its reverse (7457394937546), we obtain a palindrome (999999999999).

The spelling of 6457394937547 in words is "six trillion, four hundred fifty-seven billion, three hundred ninety-four million, nine hundred thirty-seven thousand, five hundred forty-seven".