111307543681 has 2 divisors, whose sum is σ = 111307543682. Its totient is φ = 111307543680.

The previous prime is 111307543663. The next prime is 111307543759. The reversal of 111307543681 is 186345703111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65032650225 + 46274893456 = 255015^2 + 215116^2 .

It is a cyclic number.

It is not a de Polignac number, because 111307543681 - 2¹⁵ = 111307510913 is a prime.

It is a super-2 number, since 2×111307543681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111307543601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55653771840 + 55653771841.

It is an arithmetic number, because the mean of its divisors is an integer number (55653771841).

Almost surely, 2^111307543681 is an apocalyptic number.

It is an amenable number.

111307543681 is a deficient number, since it is larger than the sum of its proper divisors (1).

111307543681 is an equidigital number, since it uses as much as digits as its factorization.

111307543681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 111307543681 in words is "one hundred eleven billion, three hundred seven million, five hundred forty-three thousand, six hundred eighty-one".