11111234556677 has 2 divisors, whose sum is σ = 11111234556678. Its totient is φ = 11111234556676.

The previous prime is 11111234556659. The next prime is 11111234556691. The reversal of 11111234556677 is 77665543211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9156833352676 + 1954401204001 = 3026026^2 + 1397999^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111234556677 - 2¹⁶ = 11111234491141 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111234556607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555617278338 + 5555617278339.

It is an arithmetic number, because the mean of its divisors is an integer number (5555617278339).

Almost surely, 2^{11111234556677} is an apocalyptic number.

It is an amenable number.

11111234556677 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111234556677 is an equidigital number, since it uses as much as digits as its factorization.

11111234556677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

Adding to 11111234556677 its reverse (77665543211111), we get a palindrome (88776777767788).

The spelling of 11111234556677 in words is "eleven trillion, one hundred eleven billion, two hundred thirty-four million, five hundred fifty-six thousand, six hundred seventy-seven".