64276729669 has 2 divisors, whose sum is σ = 64276729670. Its totient is φ = 64276729668.

The previous prime is 64276729667. The next prime is 64276729697. The reversal of 64276729669 is 96692767246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59091289569 + 5185440100 = 243087^2 + 72010^2 .

It is a cyclic number.

It is not a de Polignac number, because 64276729669 - 2¹ = 64276729667 is a prime.

It is a super-2 number, since 2×64276729669² (a number of 22 digits) contains 22 as substring.

Together with 64276729667, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64276729669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64276729663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32138364834 + 32138364835.

It is an arithmetic number, because the mean of its divisors is an integer number (32138364835).

Almost surely, 2^64276729669 is an apocalyptic number.

It is an amenable number.

64276729669 is a deficient number, since it is larger than the sum of its proper divisors (1).

64276729669 is an equidigital number, since it uses as much as digits as its factorization.

64276729669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 64.

The spelling of 64276729669 in words is "sixty-four billion, two hundred seventy-six million, seven hundred twenty-nine thousand, six hundred sixty-nine".