111668654557 has 2 divisors, whose sum is σ = 111668654558. Its totient is φ = 111668654556.

The previous prime is 111668654527. The next prime is 111668654623. The reversal of 111668654557 is 755456866111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60312483396 + 51356171161 = 245586^2 + 226619^2 .

It is a cyclic number.

It is not a de Polignac number, because 111668654557 - 2¹¹ = 111668652509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111668654498 and 111668654507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111668654527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55834327278 + 55834327279.

It is an arithmetic number, because the mean of its divisors is an integer number (55834327279).

Almost surely, 2^111668654557 is an apocalyptic number.

It is an amenable number.

111668654557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111668654557 is an equidigital number, since it uses as much as digits as its factorization.

111668654557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048000, while the sum is 55.

The spelling of 111668654557 in words is "one hundred eleven billion, six hundred sixty-eight million, six hundred fifty-four thousand, five hundred fifty-seven".