64678987464 has 192 divisors, whose sum is σ = 202770267840. Its totient is φ = 17041006080.

The previous prime is 64678987463. The next prime is 64678987511. The reversal of 64678987464 is 46478987646.

It is not an unprimeable number, because it can be changed into a prime (64678987463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24016102 + ... + 24018794.

It is an arithmetic number, because the mean of its divisors is an integer number (1056095145).

Almost surely, 2^64678987464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64678987464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101385133920).

64678987464 is an abundant number, since it is smaller than the sum of its proper divisors (138091280376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64678987464 is a wasteful number, since it uses less digits than its factorization.

64678987464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4289 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 69.

The spelling of 64678987464 in words is "sixty-four billion, six hundred seventy-eight million, nine hundred eighty-seven thousand, four hundred sixty-four".