11112600781 has 2 divisors, whose sum is σ = 11112600782. Its totient is φ = 11112600780.

The previous prime is 11112600769. The next prime is 11112600803. The reversal of 11112600781 is 18700621111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9039255625 + 2073345156 = 95075^2 + 45534^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112600781 - 2²³ = 11104212173 is a prime.

It is a super-2 number, since 2×11112600781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112600731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556300390 + 5556300391.

It is an arithmetic number, because the mean of its divisors is an integer number (5556300391).

Almost surely, 2^11112600781 is an apocalyptic number.

It is an amenable number.

11112600781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112600781 is an equidigital number, since it uses as much as digits as its factorization.

11112600781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 28.

The spelling of 11112600781 in words is "eleven billion, one hundred twelve million, six hundred thousand, seven hundred eighty-one".