10442755621 has 2 divisors, whose sum is σ = 10442755622. Its totient is φ = 10442755620.

The previous prime is 10442755607. The next prime is 10442755651. The reversal of 10442755621 is 12655724401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5339224900 + 5103530721 = 73070^2 + 71439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10442755621 is a prime.

It is a super-2 number, since 2×10442755621² (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 (10442755651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5221377810 + 5221377811.

It is an arithmetic number, because the mean of its divisors is an integer number (5221377811).

Almost surely, 2^10442755621 is an apocalyptic number.

It is an amenable number.

10442755621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10442755621 is an equidigital number, since it uses as much as digits as its factorization.

10442755621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 10442755621 in words is "ten billion, four hundred forty-two million, seven hundred fifty-five thousand, six hundred twenty-one".