63457457509 has 2 divisors, whose sum is σ = 63457457510. Its totient is φ = 63457457508.

The previous prime is 63457457431. The next prime is 63457457519. The reversal of 63457457509 is 90575475436.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44205062500 + 19252395009 = 210250^2 + 138753^2 .

It is a cyclic number.

It is not a de Polignac number, because 63457457509 - 2¹³ = 63457449317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63457457509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63457457519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31728728754 + 31728728755.

It is an arithmetic number, because the mean of its divisors is an integer number (31728728755).

Almost surely, 2^63457457509 is an apocalyptic number.

It is an amenable number.

63457457509 is a deficient number, since it is larger than the sum of its proper divisors (1).

63457457509 is an equidigital number, since it uses as much as digits as its factorization.

63457457509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 63457457509 in words is "sixty-three billion, four hundred fifty-seven million, four hundred fifty-seven thousand, five hundred nine".