111545337781 has 2 divisors, whose sum is σ = 111545337782. Its totient is φ = 111545337780.

The previous prime is 111545337763. The next prime is 111545337797. The reversal of 111545337781 is 187733545111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102149912881 + 9395424900 = 319609^2 + 96930^2 .

It is a cyclic number.

It is not a de Polignac number, because 111545337781 - 2³¹ = 109397854133 is a prime.

It is a super-2 number, since 2×111545337781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111545337721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55772668890 + 55772668891.

It is an arithmetic number, because the mean of its divisors is an integer number (55772668891).

Almost surely, 2^111545337781 is an apocalyptic number.

It is an amenable number.

111545337781 is a deficient number, since it is larger than the sum of its proper divisors (1).

111545337781 is an equidigital number, since it uses as much as digits as its factorization.

111545337781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 46.

The spelling of 111545337781 in words is "one hundred eleven billion, five hundred forty-five million, three hundred thirty-seven thousand, seven hundred eighty-one".