11641986409 has 2 divisors, whose sum is σ = 11641986410. Its totient is φ = 11641986408.

The previous prime is 11641986271. The next prime is 11641986437. The reversal of 11641986409 is 90468914611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9549198400 + 2092788009 = 97720^2 + 45747^2 .

It is a cyclic number.

It is not a de Polignac number, because 11641986409 - 2¹³ = 11641978217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11641986439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5820993204 + 5820993205.

It is an arithmetic number, because the mean of its divisors is an integer number (5820993205).

Almost surely, 2^11641986409 is an apocalyptic number.

It is an amenable number.

11641986409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11641986409 is an equidigital number, since it uses as much as digits as its factorization.

11641986409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 11641986409 in words is "eleven billion, six hundred forty-one million, nine hundred eighty-six thousand, four hundred nine".