11581433849 has 2 divisors, whose sum is σ = 11581433850. Its totient is φ = 11581433848.

The previous prime is 11581433833. The next prime is 11581433861. The reversal of 11581433849 is 94833418511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8661652624 + 2919781225 = 93068^2 + 54035^2 .

It is a cyclic number.

It is not a de Polignac number, because 11581433849 - 2⁴ = 11581433833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11581433819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5790716924 + 5790716925.

It is an arithmetic number, because the mean of its divisors is an integer number (5790716925).

Almost surely, 2^11581433849 is an apocalyptic number.

It is an amenable number.

11581433849 is a deficient number, since it is larger than the sum of its proper divisors (1).

11581433849 is an equidigital number, since it uses as much as digits as its factorization.

11581433849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 47.

The spelling of 11581433849 in words is "eleven billion, five hundred eighty-one million, four hundred thirty-three thousand, eight hundred forty-nine".