2064678242389 has 12 divisors (see below), whose sum is σ = 2543049072684. Its totient is φ = 1665622783104.

The previous prime is 2064678242339. The next prime is 2064678242399. The reversal of 2064678242389 is 9832428764602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 732835299364 + 1331842943025 = 856058^2 + 1154055^2 .

It is not a de Polignac number, because 2064678242389 - 2⁹ = 2064678241877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064678242339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1239301834 + ... + 1239303499.

It is an arithmetic number, because the mean of its divisors is an integer number (211920756057).

Almost surely, 2^{2064678242389} is an apocalyptic number.

It is an amenable number.

2064678242389 is a deficient number, since it is larger than the sum of its proper divisors (478370830295).

2064678242389 is a wasteful number, since it uses less digits than its factorization.

2064678242389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478605364 (or 2478605357 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 61.

The spelling of 2064678242389 in words is "two trillion, sixty-four billion, six hundred seventy-eight million, two hundred forty-two thousand, three hundred eighty-nine".