10091511265609 has 2 divisors, whose sum is σ = 10091511265610. Its totient is φ = 10091511265608.

The previous prime is 10091511265607. The next prime is 10091511265621. The reversal of 10091511265609 is 90656211519001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10011984445584 + 79526820025 = 3164172^2 + 282005^2 .

It is an emirp because it is prime and its reverse (90656211519001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10091511265609 - 2¹ = 10091511265607 is a prime.

It is a super-2 number, since 2×10091511265609² (a number of 27 digits) contains 22 as substring.

Together with 10091511265607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10091511265607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045755632804 + 5045755632805.

It is an arithmetic number, because the mean of its divisors is an integer number (5045755632805).

Almost surely, 2^{10091511265609} is an apocalyptic number.

It is an amenable number.

10091511265609 is a deficient number, since it is larger than the sum of its proper divisors (1).

10091511265609 is an equidigital number, since it uses as much as digits as its factorization.

10091511265609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 46.

The spelling of 10091511265609 in words is "ten trillion, ninety-one billion, five hundred eleven million, two hundred sixty-five thousand, six hundred nine".