64681005468 has 12 divisors (see below), whose sum is σ = 150922346120. Its totient is φ = 21560335152.

The previous prime is 64681005461. The next prime is 64681005497. The reversal of 64681005468 is 86450018646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64681005461) 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 3 ways as a sum of consecutive naturals, for example, 2695041883 + ... + 2695041906.

Almost surely, 2^64681005468 is an apocalyptic number.

It is an amenable number.

64681005468 is an abundant number, since it is smaller than the sum of its proper divisors (86241340652).

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

64681005468 is a wasteful number, since it uses less digits than its factorization.

64681005468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390083796 (or 5390083794 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 64681005468 in words is "sixty-four billion, six hundred eighty-one million, five thousand, four hundred sixty-eight".