64449522619 has 2 divisors, whose sum is σ = 64449522620. Its totient is φ = 64449522618.

The previous prime is 64449522617. The next prime is 64449522653. The reversal of 64449522619 is 91622594446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64449522619 - 2¹ = 64449522617 is a prime.

It is a super-2 number, since 2×64449522619² (a number of 22 digits) contains 22 as substring.

Together with 64449522617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64449522617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32224761309 + 32224761310.

It is an arithmetic number, because the mean of its divisors is an integer number (32224761310).

Almost surely, 2^64449522619 is an apocalyptic number.

64449522619 is a deficient number, since it is larger than the sum of its proper divisors (1).

64449522619 is an equidigital number, since it uses as much as digits as its factorization.

64449522619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The spelling of 64449522619 in words is "sixty-four billion, four hundred forty-nine million, five hundred twenty-two thousand, six hundred nineteen".