11571829109 has 2 divisors, whose sum is σ = 11571829110. Its totient is φ = 11571829108.

The previous prime is 11571829033. The next prime is 11571829117. The reversal of 11571829109 is 90192817511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7097557009 + 4474272100 = 84247^2 + 66890^2 .

It is an emirp because it is prime and its reverse (90192817511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11571829109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11571829109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11571829169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5785914554 + 5785914555.

It is an arithmetic number, because the mean of its divisors is an integer number (5785914555).

Almost surely, 2^11571829109 is an apocalyptic number.

It is an amenable number.

11571829109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11571829109 is an equidigital number, since it uses as much as digits as its factorization.

11571829109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 44.

The spelling of 11571829109 in words is "eleven billion, five hundred seventy-one million, eight hundred twenty-nine thousand, one hundred nine".