64722744722749 has 2 divisors, whose sum is σ = 64722744722750. Its totient is φ = 64722744722748.

The previous prime is 64722744722707. The next prime is 64722744722767. The reversal of 64722744722749 is 94722744722746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63342338264100 + 1380406458649 = 7958790^2 + 1174907^2 .

It is a cyclic number.

It is not a de Polignac number, because 64722744722749 - 2¹³ = 64722744714557 is a prime.

It is a super-2 number, since 2×64722744722749² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64722744782749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32361372361374 + 32361372361375.

It is an arithmetic number, because the mean of its divisors is an integer number (32361372361375).

Almost surely, 2^{64722744722749} is an apocalyptic number.

It is an amenable number.

64722744722749 is a deficient number, since it is larger than the sum of its proper divisors (1).

64722744722749 is an equidigital number, since it uses as much as digits as its factorization.

64722744722749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 531062784, while the sum is 67.

The spelling of 64722744722749 in words is "sixty-four trillion, seven hundred twenty-two billion, seven hundred forty-four million, seven hundred twenty-two thousand, seven hundred forty-nine".