745037062441621 has 2 divisors, whose sum is σ = 745037062441622. Its totient is φ = 745037062441620.

The previous prime is 745037062441549. The next prime is 745037062441703. The reversal of 745037062441621 is 126144260730547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488478998636721 + 256558063804900 = 22101561^2 + 16017430^2 .

It is a cyclic number.

It is not a de Polignac number, because 745037062441621 - 2⁹ = 745037062441109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745037065441621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372518531220810 + 372518531220811.

It is an arithmetic number, because the mean of its divisors is an integer number (372518531220811).

Almost surely, 2^{745037062441621} is an apocalyptic number.

It is an amenable number.

745037062441621 is a deficient number, since it is larger than the sum of its proper divisors (1).

745037062441621 is an equidigital number, since it uses as much as digits as its factorization.

745037062441621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 745037062441621 in words is "seven hundred forty-five trillion, thirty-seven billion, sixty-two million, four hundred forty-one thousand, six hundred twenty-one".