64243381128 has 32 divisors (see below), whose sum is σ = 160840923360. Its totient is φ = 21383464320.

The previous prime is 64243381099. The next prime is 64243381129. The reversal of 64243381128 is 82118334246.

64243381128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64243381128.

It is not an unprimeable number, because it can be changed into a prime (64243381129) 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, 1920325 + ... + 1953492.

It is an arithmetic number, because the mean of its divisors is an integer number (5026278855).

Almost surely, 2^64243381128 is an apocalyptic number.

It is an amenable number.

64243381128 is an abundant number, since it is smaller than the sum of its proper divisors (96597542232).

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

64243381128 is a wasteful number, since it uses less digits than its factorization.

64243381128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874517 (or 3874513 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The spelling of 64243381128 in words is "sixty-four billion, two hundred forty-three million, three hundred eighty-one thousand, one hundred twenty-eight".