64942893519349 has 2 divisors, whose sum is σ = 64942893519350. Its totient is φ = 64942893519348.

The previous prime is 64942893519319. The next prime is 64942893519407. The reversal of 64942893519349 is 94391539824946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45207469322500 + 19735424196849 = 6723650^2 + 4442457^2 .

It is a cyclic number.

It is not a de Polignac number, because 64942893519349 - 2¹¹ = 64942893517301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64942893519319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32471446759674 + 32471446759675.

It is an arithmetic number, because the mean of its divisors is an integer number (32471446759675).

Almost surely, 2^{64942893519349} is an apocalyptic number.

It is an amenable number.

64942893519349 is a deficient number, since it is larger than the sum of its proper divisors (1).

64942893519349 is an equidigital number, since it uses as much as digits as its factorization.

64942893519349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1813985280, while the sum is 76.

The spelling of 64942893519349 in words is "sixty-four trillion, nine hundred forty-two billion, eight hundred ninety-three million, five hundred nineteen thousand, three hundred forty-nine".