64136816071678 has 32 divisors (see below), whose sum is σ = 112024309063680. Its totient is φ = 26968345541280.

The previous prime is 64136816071667. The next prime is 64136816071681. The reversal of 64136816071678 is 87617061863146.

64136816071678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64136816071678² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104642173 + ... + 105253303.

It is an arithmetic number, because the mean of its divisors is an integer number (3500759658240).

Almost surely, 2^{64136816071678} is an apocalyptic number.

64136816071678 is a deficient number, since it is larger than the sum of its proper divisors (47887492992002).

64136816071678 is a wasteful number, since it uses less digits than its factorization.

64136816071678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752632.

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 64136816071678 in words is "sixty-four trillion, one hundred thirty-six billion, eight hundred sixteen million, seventy-one thousand, six hundred seventy-eight".