11561189459 has 2 divisors, whose sum is σ = 11561189460. Its totient is φ = 11561189458.

The previous prime is 11561189429. The next prime is 11561189513. The reversal of 11561189459 is 95498116511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11561189459 - 2¹⁶ = 11561123923 is a prime.

It is a super-2 number, since 2×11561189459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11561189429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780594729 + 5780594730.

It is an arithmetic number, because the mean of its divisors is an integer number (5780594730).

Almost surely, 2^11561189459 is an apocalyptic number.

11561189459 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561189459 is an equidigital number, since it uses as much as digits as its factorization.

11561189459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 50.

The spelling of 11561189459 in words is "eleven billion, five hundred sixty-one million, one hundred eighty-nine thousand, four hundred fifty-nine".