8913790485661 has 2 divisors, whose sum is σ = 8913790485662. Its totient is φ = 8913790485660.

The previous prime is 8913790485647. The next prime is 8913790485689. The reversal of 8913790485661 is 1665840973198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6653897635225 + 2259892850436 = 2579515^2 + 1503294^2 .

It is a cyclic number.

It is not a de Polignac number, because 8913790485661 - 2¹¹ = 8913790483613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8913790485161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4456895242830 + 4456895242831.

It is an arithmetic number, because the mean of its divisors is an integer number (4456895242831).

Almost surely, 2^{8913790485661} is an apocalyptic number.

It is an amenable number.

8913790485661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8913790485661 is an equidigital number, since it uses as much as digits as its factorization.

8913790485661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 67.

The spelling of 8913790485661 in words is "eight trillion, nine hundred thirteen billion, seven hundred ninety million, four hundred eighty-five thousand, six hundred sixty-one".