111361615481 has 2 divisors, whose sum is σ = 111361615482. Its totient is φ = 111361615480.

The previous prime is 111361615399. The next prime is 111361615501. The reversal of 111361615481 is 184516163111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102986437225 + 8375178256 = 320915^2 + 91516^2 .

It is a cyclic number.

It is not a de Polignac number, because 111361615481 - 2²² = 111357421177 is a prime.

It is a super-2 number, since 2×111361615481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111361611481) 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, 55680807740 + 55680807741.

It is an arithmetic number, because the mean of its divisors is an integer number (55680807741).

Almost surely, 2^111361615481 is an apocalyptic number.

It is an amenable number.

111361615481 is a deficient number, since it is larger than the sum of its proper divisors (1).

111361615481 is an equidigital number, since it uses as much as digits as its factorization.

111361615481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 38.

Adding to 111361615481 its reverse (184516163111), we get a palindrome (295877778592).

The spelling of 111361615481 in words is "one hundred eleven billion, three hundred sixty-one million, six hundred fifteen thousand, four hundred eighty-one".