64378165205752 has 32 divisors (see below), whose sum is σ = 127810865967120. Its totient is φ = 30295305341440.

The previous prime is 64378165205681. The next prime is 64378165205791. The reversal of 64378165205752 is 25750256187346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11648478 + ... + 16261714.

Almost surely, 2^{64378165205752} is an apocalyptic number.

It is an amenable number.

64378165205752 is a deficient number, since it is larger than the sum of its proper divisors (63432700761368).

64378165205752 is a wasteful number, since it uses less digits than its factorization.

64378165205752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715871 (or 4715867 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 61.

The spelling of 64378165205752 in words is "sixty-four trillion, three hundred seventy-eight billion, one hundred sixty-five million, two hundred five thousand, seven hundred fifty-two".