64255218634388 has 36 divisors (see below), whose sum is σ = 114351820180416. Its totient is φ = 31592197533600.

The previous prime is 64255218634357. The next prime is 64255218634433. The reversal of 64255218634388 is 88343681255246.

64255218634388 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64255218634388² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53449331 + ... + 54638277.

It is an arithmetic number, because the mean of its divisors is an integer number (3176439449456).

Almost surely, 2^{64255218634388} is an apocalyptic number.

It is an amenable number.

64255218634388 is a deficient number, since it is larger than the sum of its proper divisors (50096601546028).

64255218634388 is a wasteful number, since it uses less digits than its factorization.

64255218634388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192704 (or 1192641 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 65.

The spelling of 64255218634388 in words is "sixty-four trillion, two hundred fifty-five billion, two hundred eighteen million, six hundred thirty-four thousand, three hundred eighty-eight".