11551542616109 has 2 divisors, whose sum is σ = 11551542616110. Its totient is φ = 11551542616108.

The previous prime is 11551542616099. The next prime is 11551542616147. The reversal of 11551542616109 is 90161624515511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7193794515625 + 4357748100484 = 2682125^2 + 2087522^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551542616109 - 2²⁴ = 11551525838893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11551542616189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775771308054 + 5775771308055.

It is an arithmetic number, because the mean of its divisors is an integer number (5775771308055).

Almost surely, 2^{11551542616109} is an apocalyptic number.

It is an amenable number.

11551542616109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551542616109 is an equidigital number, since it uses as much as digits as its factorization.

11551542616109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 11551542616109 in words is "eleven trillion, five hundred fifty-one billion, five hundred forty-two million, six hundred sixteen thousand, one hundred nine".