64889392337018 has 16 divisors (see below), whose sum is σ = 98984467920960. Its totient is φ = 31894576909056.

The previous prime is 64889392337009. The next prime is 64889392337023. The reversal of 64889392337018 is 81073329398846.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17103971 + ... + 20550537.

It is an arithmetic number, because the mean of its divisors is an integer number (6186529245060).

Almost surely, 2^{64889392337018} is an apocalyptic number.

64889392337018 is a deficient number, since it is larger than the sum of its proper divisors (34095075583942).

64889392337018 is a wasteful number, since it uses less digits than its factorization.

64889392337018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606181.

The product of its (nonzero) digits is 376233984, while the sum is 71.

The spelling of 64889392337018 in words is "sixty-four trillion, eight hundred eighty-nine billion, three hundred ninety-two million, three hundred thirty-seven thousand, eighteen".