64274221188 has 144 divisors (see below), whose sum is σ = 171329558400. Its totient is φ = 20277430272.

The previous prime is 64274221169. The next prime is 64274221199. The reversal of 64274221188 is 88112247246.

64274221188 is a `hidden beast` number, since 6 + 42 + 7 + 422 + 1 + 188 = 666.

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 47 ways as a sum of consecutive naturals, for example, 37874356 + ... + 37876052.

It is an arithmetic number, because the mean of its divisors is an integer number (1189788600).

Almost surely, 2^64274221188 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 64274221188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85664779200).

64274221188 is an abundant number, since it is smaller than the sum of its proper divisors (107055337212).

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

64274221188 is a wasteful number, since it uses less digits than its factorization.

64274221188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2181 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The spelling of 64274221188 in words is "sixty-four billion, two hundred seventy-four million, two hundred twenty-one thousand, one hundred eighty-eight".