11845639261 has 2 divisors, whose sum is σ = 11845639262. Its totient is φ = 11845639260.

The previous prime is 11845639163. The next prime is 11845639297. The reversal of 11845639261 is 16293654811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5958913636 + 5886725625 = 77194^2 + 76725^2 .

It is a cyclic number.

It is not a de Polignac number, because 11845639261 - 2¹⁷ = 11845508189 is a prime.

It is a super-2 number, since 2×11845639261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11845669261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5922819630 + 5922819631.

It is an arithmetic number, because the mean of its divisors is an integer number (5922819631).

Almost surely, 2^11845639261 is an apocalyptic number.

It is an amenable number.

11845639261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11845639261 is an equidigital number, since it uses as much as digits as its factorization.

11845639261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The spelling of 11845639261 in words is "eleven billion, eight hundred forty-five million, six hundred thirty-nine thousand, two hundred sixty-one".