10645245331621 has 2 divisors, whose sum is σ = 10645245331622. Its totient is φ = 10645245331620.

The previous prime is 10645245331543. The next prime is 10645245331657. The reversal of 10645245331621 is 12613354254601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10606003702596 + 39241629025 = 3256686^2 + 198095^2 .

It is a cyclic number.

It is not a de Polignac number, because 10645245331621 - 2⁹ = 10645245331109 is a prime.

It is a super-2 number, since 2×10645245331621² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10645245331321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322622665810 + 5322622665811.

It is an arithmetic number, because the mean of its divisors is an integer number (5322622665811).

Almost surely, 2^{10645245331621} is an apocalyptic number.

It is an amenable number.

10645245331621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10645245331621 is an equidigital number, since it uses as much as digits as its factorization.

10645245331621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 10645245331621 in words is "ten trillion, six hundred forty-five billion, two hundred forty-five million, three hundred thirty-one thousand, six hundred twenty-one".