64044691199987 has 2 divisors, whose sum is σ = 64044691199988. Its totient is φ = 64044691199986.

The previous prime is 64044691199971. The next prime is 64044691200029. The reversal of 64044691199987 is 78999119644046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64044691199987 - 2⁴ = 64044691199971 is a prime.

It is not a weakly prime, because it can be changed into another prime (64044691199887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32022345599993 + 32022345599994.

It is an arithmetic number, because the mean of its divisors is an integer number (32022345599994).

Almost surely, 2^{64044691199987} is an apocalyptic number.

64044691199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

64044691199987 is an equidigital number, since it uses as much as digits as its factorization.

64044691199987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846526464, while the sum is 77.

The spelling of 64044691199987 in words is "sixty-four trillion, forty-four billion, six hundred ninety-one million, one hundred ninety-nine thousand, nine hundred eighty-seven".