10164728396621 has 2 divisors, whose sum is σ = 10164728396622. Its totient is φ = 10164728396620.

The previous prime is 10164728396593. The next prime is 10164728396629. The reversal of 10164728396621 is 12669382746101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9321334123396 + 843394273225 = 3053086^2 + 918365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10164728396621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10164728396629) 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 as a sum of consecutive naturals, namely, 5082364198310 + 5082364198311.

It is an arithmetic number, because the mean of its divisors is an integer number (5082364198311).

Almost surely, 2^{10164728396621} is an apocalyptic number.

It is an amenable number.

10164728396621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10164728396621 is an equidigital number, since it uses as much as digits as its factorization.

10164728396621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 10164728396621 in words is "ten trillion, one hundred sixty-four billion, seven hundred twenty-eight million, three hundred ninety-six thousand, six hundred twenty-one".