64440680486 has 16 divisors (see below), whose sum is σ = 118967410464. Its totient is φ = 25493016384.

The previous prime is 64440680483. The next prime is 64440680527. The reversal of 64440680486 is 68408604446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64440680483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177034655 + ... + 177035018.

It is an arithmetic number, because the mean of its divisors is an integer number (7435463154).

Almost surely, 2^64440680486 is an apocalyptic number.

64440680486 is a deficient number, since it is larger than the sum of its proper divisors (54526729978).

64440680486 is a wasteful number, since it uses less digits than its factorization.

64440680486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354069695.

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 64440680486 in words is "sixty-four billion, four hundred forty million, six hundred eighty thousand, four hundred eighty-six".