64104431133991 has 2 divisors, whose sum is σ = 64104431133992. Its totient is φ = 64104431133990.

The previous prime is 64104431133973. The next prime is 64104431134087. The reversal of 64104431133991 is 19933113440146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64104431133991 - 2¹³ = 64104431125799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64104431133971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32052215566995 + 32052215566996.

It is an arithmetic number, because the mean of its divisors is an integer number (32052215566996).

Almost surely, 2^{64104431133991} is an apocalyptic number.

64104431133991 is a deficient number, since it is larger than the sum of its proper divisors (1).

64104431133991 is an equidigital number, since it uses as much as digits as its factorization.

64104431133991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 64104431133991 in words is "sixty-four trillion, one hundred four billion, four hundred thirty-one million, one hundred thirty-three thousand, nine hundred ninety-one".