210564680657413 has 2 divisors, whose sum is σ = 210564680657414. Its totient is φ = 210564680657412.

The previous prime is 210564680657347. The next prime is 210564680657459. The reversal of 210564680657413 is 314756086465012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210564680657409 + 4 = 14510847^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210564680657413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210564680657713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105282340328706 + 105282340328707.

It is an arithmetic number, because the mean of its divisors is an integer number (105282340328707).

Almost surely, 2^{210564680657413} is an apocalyptic number.

It is an amenable number.

210564680657413 is a deficient number, since it is larger than the sum of its proper divisors (1).

210564680657413 is an equidigital number, since it uses as much as digits as its factorization.

210564680657413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 210564680657413 in words is "two hundred ten trillion, five hundred sixty-four billion, six hundred eighty million, six hundred fifty-seven thousand, four hundred thirteen".