11531612089 has 2 divisors, whose sum is σ = 11531612090. Its totient is φ = 11531612088.

The previous prime is 11531612039. The next prime is 11531612119. The reversal of 11531612089 is 98021613511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11333731600 + 197880489 = 106460^2 + 14067^2 .

It is a cyclic number.

It is not a de Polignac number, because 11531612089 - 2¹⁵ = 11531579321 is a prime.

It is not a weakly prime, because it can be changed into another prime (11531612039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5765806044 + 5765806045.

It is an arithmetic number, because the mean of its divisors is an integer number (5765806045).

Almost surely, 2^11531612089 is an apocalyptic number.

It is an amenable number.

11531612089 is a deficient number, since it is larger than the sum of its proper divisors (1).

11531612089 is an equidigital number, since it uses as much as digits as its factorization.

11531612089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 11531612089 in words is "eleven billion, five hundred thirty-one million, six hundred twelve thousand, eighty-nine".