1797066922621 has 2 divisors, whose sum is σ = 1797066922622. Its totient is φ = 1797066922620.

The previous prime is 1797066922613. The next prime is 1797066922697. The reversal of 1797066922621 is 1262296607971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1673760600121 + 123306322500 = 1293739^2 + 351150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797066922621 - 2³ = 1797066922613 is a prime.

It is a super-2 number, since 2×1797066922621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1797066922421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 898533461310 + 898533461311.

It is an arithmetic number, because the mean of its divisors is an integer number (898533461311).

Almost surely, 2^{1797066922621} is an apocalyptic number.

It is an amenable number.

1797066922621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1797066922621 is an equidigital number, since it uses as much as digits as its factorization.

1797066922621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 1797066922621 in words is "one trillion, seven hundred ninety-seven billion, sixty-six million, nine hundred twenty-two thousand, six hundred twenty-one".