64723540913069 has 2 divisors, whose sum is σ = 64723540913070. Its totient is φ = 64723540913068.

The previous prime is 64723540913063. The next prime is 64723540913147. The reversal of 64723540913069 is 96031904532746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41419392924100 + 23304147988969 = 6435790^2 + 4827437^2 .

It is a cyclic number.

It is not a de Polignac number, because 64723540913069 - 2¹² = 64723540908973 is a prime.

It is a super-2 number, since 2×64723540913069² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64723540912999 and 64723540913017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64723540913063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32361770456534 + 32361770456535.

It is an arithmetic number, because the mean of its divisors is an integer number (32361770456535).

Almost surely, 2^{64723540913069} is an apocalyptic number.

It is an amenable number.

64723540913069 is a deficient number, since it is larger than the sum of its proper divisors (1).

64723540913069 is an equidigital number, since it uses as much as digits as its factorization.

64723540913069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 64723540913069 in words is "sixty-four trillion, seven hundred twenty-three billion, five hundred forty million, nine hundred thirteen thousand, sixty-nine".