111761539369 has 2 divisors, whose sum is σ = 111761539370. Its totient is φ = 111761539368.

The previous prime is 111761539327. The next prime is 111761539391. The reversal of 111761539369 is 963935167111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106806083344 + 4955456025 = 326812^2 + 70395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111761539369 is a prime.

It is a super-2 number, since 2×111761539369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111761539969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55880769684 + 55880769685.

It is an arithmetic number, because the mean of its divisors is an integer number (55880769685).

Almost surely, 2^111761539369 is an apocalyptic number.

It is an amenable number.

111761539369 is a deficient number, since it is larger than the sum of its proper divisors (1).

111761539369 is an equidigital number, since it uses as much as digits as its factorization.

111761539369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 52.

The spelling of 111761539369 in words is "one hundred eleven billion, seven hundred sixty-one million, five hundred thirty-nine thousand, three hundred sixty-nine".