716630371621 has 2 divisors, whose sum is σ = 716630371622. Its totient is φ = 716630371620.

The previous prime is 716630371573. The next prime is 716630371627. The reversal of 716630371621 is 126173036617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709283996100 + 7346375521 = 842190^2 + 85711^2 .

It is a cyclic number.

It is not a de Polignac number, because 716630371621 - 2⁷ = 716630371493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716630371627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358315185810 + 358315185811.

It is an arithmetic number, because the mean of its divisors is an integer number (358315185811).

Almost surely, 2^716630371621 is an apocalyptic number.

It is an amenable number.

716630371621 is a deficient number, since it is larger than the sum of its proper divisors (1).

716630371621 is an equidigital number, since it uses as much as digits as its factorization.

716630371621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 716630371621 in words is "seven hundred sixteen billion, six hundred thirty million, three hundred seventy-one thousand, six hundred twenty-one".