10643464621 has 2 divisors, whose sum is σ = 10643464622. Its totient is φ = 10643464620.

The previous prime is 10643464589. The next prime is 10643464673. The reversal of 10643464621 is 12646434601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7706908521 + 2936556100 = 87789^2 + 54190^2 .

It is an emirp because it is prime and its reverse (12646434601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10643464621 - 2⁵ = 10643464589 is a prime.

It is a super-2 number, since 2×10643464621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10643464681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321732310 + 5321732311.

It is an arithmetic number, because the mean of its divisors is an integer number (5321732311).

Almost surely, 2^10643464621 is an apocalyptic number.

It is an amenable number.

10643464621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10643464621 is an equidigital number, since it uses as much as digits as its factorization.

10643464621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 10643464621 in words is "ten billion, six hundred forty-three million, four hundred sixty-four thousand, six hundred twenty-one".