64864838720 has 112 divisors (see below), whose sum is σ = 177369825600. Its totient is φ = 22345758720.

The previous prime is 64864838719. The next prime is 64864838747. The reversal of 64864838720 is 2783846846.

It is a super-2 number, since 2×64864838720² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 418055 + ... + 551814.

Almost surely, 2^64864838720 is an apocalyptic number.

It is an amenable number.

64864838720 is an abundant number, since it is smaller than the sum of its proper divisors (112504986880).

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

64864838720 is a wasteful number, since it uses less digits than its factorization.

64864838720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969916 (or 969906 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 64864838720 in words is "sixty-four billion, eight hundred sixty-four million, eight hundred thirty-eight thousand, seven hundred twenty".