11615554289 has 2 divisors, whose sum is σ = 11615554290. Its totient is φ = 11615554288.

The previous prime is 11615554217. The next prime is 11615554339. The reversal of 11615554289 is 98245551611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11584862689 + 30691600 = 107633^2 + 5540^2 .

It is an emirp because it is prime and its reverse (98245551611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11615554289 is a prime.

It is a super-2 number, since 2×11615554289² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11615554789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5807777144 + 5807777145.

It is an arithmetic number, because the mean of its divisors is an integer number (5807777145).

Almost surely, 2^11615554289 is an apocalyptic number.

It is an amenable number.

11615554289 is a deficient number, since it is larger than the sum of its proper divisors (1).

11615554289 is an equidigital number, since it uses as much as digits as its factorization.

11615554289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 47.

The spelling of 11615554289 in words is "eleven billion, six hundred fifteen million, five hundred fifty-four thousand, two hundred eighty-nine".