64724456249 has 2 divisors, whose sum is σ = 64724456250. Its totient is φ = 64724456248.

The previous prime is 64724456227. The next prime is 64724456267. The reversal of 64724456249 is 94265442746.

64724456249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44569543225 + 20154913024 = 211115^2 + 141968^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724456249 - 2⁸ = 64724455993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64724456249.

It is not a weakly prime, because it can be changed into another prime (64724456219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32362228124 + 32362228125.

It is an arithmetic number, because the mean of its divisors is an integer number (32362228125).

Almost surely, 2^64724456249 is an apocalyptic number.

It is an amenable number.

64724456249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64724456249 is an equidigital number, since it uses as much as digits as its factorization.

64724456249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 53.

The spelling of 64724456249 in words is "sixty-four billion, seven hundred twenty-four million, four hundred fifty-six thousand, two hundred forty-nine".