507730216621 has 2 divisors, whose sum is σ = 507730216622. Its totient is φ = 507730216620.

The previous prime is 507730216507. The next prime is 507730216633. The reversal of 507730216621 is 126612037705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441068656900 + 66661559721 = 664130^2 + 258189^2 .

It is a cyclic number.

It is not a de Polignac number, because 507730216621 - 2¹³ = 507730208429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (507730211621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253865108310 + 253865108311.

It is an arithmetic number, because the mean of its divisors is an integer number (253865108311).

Almost surely, 2^507730216621 is an apocalyptic number.

It is an amenable number.

507730216621 is a deficient number, since it is larger than the sum of its proper divisors (1).

507730216621 is an equidigital number, since it uses as much as digits as its factorization.

507730216621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 507730216621 in words is "five hundred seven billion, seven hundred thirty million, two hundred sixteen thousand, six hundred twenty-one".