64674247439 has 2 divisors, whose sum is σ = 64674247440. Its totient is φ = 64674247438.

The previous prime is 64674247397. The next prime is 64674247441. The reversal of 64674247439 is 93474247646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64674247439 is a prime.

Together with 64674247441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64674247039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32337123719 + 32337123720.

It is an arithmetic number, because the mean of its divisors is an integer number (32337123720).

Almost surely, 2^64674247439 is an apocalyptic number.

64674247439 is a deficient number, since it is larger than the sum of its proper divisors (1).

64674247439 is an equidigital number, since it uses as much as digits as its factorization.

64674247439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 56.

The spelling of 64674247439 in words is "sixty-four billion, six hundred seventy-four million, two hundred forty-seven thousand, four hundred thirty-nine".