11510291209 has 2 divisors, whose sum is σ = 11510291210. Its totient is φ = 11510291208.

The previous prime is 11510291207. The next prime is 11510291267. The reversal of 11510291209 is 90219201511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11480479609 + 29811600 = 107147^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 11510291209 - 2¹ = 11510291207 is a prime.

Together with 11510291207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11510291207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5755145604 + 5755145605.

It is an arithmetic number, because the mean of its divisors is an integer number (5755145605).

Almost surely, 2^11510291209 is an apocalyptic number.

It is an amenable number.

11510291209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11510291209 is an equidigital number, since it uses as much as digits as its factorization.

11510291209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The spelling of 11510291209 in words is "eleven billion, five hundred ten million, two hundred ninety-one thousand, two hundred nine".