64890312686 has 8 divisors (see below), whose sum is σ = 98706391344. Its totient is φ = 31988182240.

The previous prime is 64890312679. The next prime is 64890312691. The reversal of 64890312686 is 68621309846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228486875 + ... + 228487158.

It is an arithmetic number, because the mean of its divisors is an integer number (12338298918).

Almost surely, 2^64890312686 is an apocalyptic number.

64890312686 is a deficient number, since it is larger than the sum of its proper divisors (33816078658).

64890312686 is a wasteful number, since it uses less digits than its factorization.

64890312686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456974106.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 64890312686 in words is "sixty-four billion, eight hundred ninety million, three hundred twelve thousand, six hundred eighty-six".