64378229912 has 8 divisors (see below), whose sum is σ = 120709181100. Its totient is φ = 32189114952.

The previous prime is 64378229897. The next prime is 64378229921. The reversal of 64378229912 is 21992287346.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4023639362 + ... + 4023639377.

Almost surely, 2^64378229912 is an apocalyptic number.

It is an amenable number.

64378229912 is a deficient number, since it is larger than the sum of its proper divisors (56330951188).

64378229912 is a wasteful number, since it uses less digits than its factorization.

64378229912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047278745 (or 8047278741 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 64378229912 in words is "sixty-four billion, three hundred seventy-eight million, two hundred twenty-nine thousand, nine hundred twelve".