64762566989 has 2 divisors, whose sum is σ = 64762566990. Its totient is φ = 64762566988.

The previous prime is 64762566977. The next prime is 64762567099. The reversal of 64762566989 is 98966526746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62557513225 + 2205053764 = 250115^2 + 46958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64762566989 is a prime.

It is a super-2 number, since 2×64762566989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64762566949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32381283494 + 32381283495.

It is an arithmetic number, because the mean of its divisors is an integer number (32381283495).

Almost surely, 2^64762566989 is an apocalyptic number.

It is an amenable number.

64762566989 is a deficient number, since it is larger than the sum of its proper divisors (1).

64762566989 is an equidigital number, since it uses as much as digits as its factorization.

64762566989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235146240, while the sum is 68.

The spelling of 64762566989 in words is "sixty-four billion, seven hundred sixty-two million, five hundred sixty-six thousand, nine hundred eighty-nine".