64446702171938 has 8 divisors (see below), whose sum is σ = 96757696101888. Its totient is φ = 32194136804644.

The previous prime is 64446702171937. The next prime is 64446702171949. The reversal of 64446702171938 is 83917120764446.

64446702171938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64446702171937) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14607137906 + ... + 14607142317.

It is an arithmetic number, because the mean of its divisors is an integer number (12094712012736).

Almost surely, 2^{64446702171938} is an apocalyptic number.

64446702171938 is a deficient number, since it is larger than the sum of its proper divisors (32310993929950).

64446702171938 is a wasteful number, since it uses less digits than its factorization.

64446702171938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29214281328.

The product of its (nonzero) digits is 48771072, while the sum is 62.

The spelling of 64446702171938 in words is "sixty-four trillion, four hundred forty-six billion, seven hundred two million, one hundred seventy-one thousand, nine hundred thirty-eight".