64700746040257 has 2 divisors, whose sum is σ = 64700746040258. Its totient is φ = 64700746040256.

The previous prime is 64700746040171. The next prime is 64700746040261. The reversal of 64700746040257 is 75204064700746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34046186377921 + 30654559662336 = 5834911^2 + 5536656^2 .

It is a cyclic number.

It is not a de Polignac number, because 64700746040257 - 2³⁵ = 64666386301889 is a prime.

It is not a weakly prime, because it can be changed into another prime (64700746040267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32350373020128 + 32350373020129.

It is an arithmetic number, because the mean of its divisors is an integer number (32350373020129).

Almost surely, 2^{64700746040257} is an apocalyptic number.

It is an amenable number.

64700746040257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64700746040257 is an equidigital number, since it uses as much as digits as its factorization.

64700746040257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7902720, while the sum is 52.

The spelling of 64700746040257 in words is "sixty-four trillion, seven hundred billion, seven hundred forty-six million, forty thousand, two hundred fifty-seven".