11907355861 has 2 divisors, whose sum is σ = 11907355862. Its totient is φ = 11907355860.

The previous prime is 11907355847. The next prime is 11907355897. The reversal of 11907355861 is 16855370911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6192903025 + 5714452836 = 78695^2 + 75594^2 .

It is a cyclic number.

It is not a de Polignac number, because 11907355861 - 2¹¹ = 11907353813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11907355261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5953677930 + 5953677931.

It is an arithmetic number, because the mean of its divisors is an integer number (5953677931).

Almost surely, 2^11907355861 is an apocalyptic number.

It is an amenable number.

11907355861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11907355861 is an equidigital number, since it uses as much as digits as its factorization.

11907355861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 11907355861 in words is "eleven billion, nine hundred seven million, three hundred fifty-five thousand, eight hundred sixty-one".