9909425509769 has 2 divisors, whose sum is σ = 9909425509770. Its totient is φ = 9909425509768.

The previous prime is 9909425509747. The next prime is 9909425509783. The reversal of 9909425509769 is 9679055249099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7558073148025 + 2351352361744 = 2749195^2 + 1533412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9909425509769 is a prime.

It is a super-2 number, since 2×9909425509769² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9909425509696 and 9909425509705.

It is not a weakly prime, because it can be changed into another prime (9909425509799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4954712754884 + 4954712754885.

It is an arithmetic number, because the mean of its divisors is an integer number (4954712754885).

Almost surely, 2^{9909425509769} is an apocalyptic number.

It is an amenable number.

9909425509769 is a deficient number, since it is larger than the sum of its proper divisors (1).

9909425509769 is an equidigital number, since it uses as much as digits as its factorization.

9909425509769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 496011600, while the sum is 74.

The spelling of 9909425509769 in words is "nine trillion, nine hundred nine billion, four hundred twenty-five million, five hundred nine thousand, seven hundred sixty-nine".