64893430368 has 96 divisors (see below), whose sum is σ = 203831964000. Its totient is φ = 19967205888.

The previous prime is 64893430351. The next prime is 64893430369. The reversal of 64893430368 is 86303439846.

64893430368 is a `hidden beast` number, since 64 + 8 + 93 + 430 + 3 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×64893430368² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64893430369) 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 15 ways as a sum of consecutive naturals, for example, 2877543 + ... + 2900006.

It is an arithmetic number, because the mean of its divisors is an integer number (2123249625).

Almost surely, 2^64893430368 is an apocalyptic number.

It is an amenable number.

64893430368 is an abundant number, since it is smaller than the sum of its proper divisors (138938533632).

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

64893430368 is a wasteful number, since it uses less digits than its factorization.

64893430368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777581 (or 5777567 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 64893430368 in words is "sixty-four billion, eight hundred ninety-three million, four hundred thirty thousand, three hundred sixty-eight".