10216407661 has 2 divisors, whose sum is σ = 10216407662. Its totient is φ = 10216407660.

The previous prime is 10216407623. The next prime is 10216407671. The reversal of 10216407661 is 16670461201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10041242436 + 175165225 = 100206^2 + 13235^2 .

It is a cyclic number.

It is not a de Polignac number, because 10216407661 - 2²⁹ = 9679536749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10216407611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108203830 + 5108203831.

It is an arithmetic number, because the mean of its divisors is an integer number (5108203831).

Almost surely, 2^10216407661 is an apocalyptic number.

It is an amenable number.

10216407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10216407661 is an equidigital number, since it uses as much as digits as its factorization.

10216407661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 10216407661 its reverse (16670461201), we get a palindrome (26886868862).

The spelling of 10216407661 in words is "ten billion, two hundred sixteen million, four hundred seven thousand, six hundred sixty-one".