1123186885657 has 2 divisors, whose sum is σ = 1123186885658. Its totient is φ = 1123186885656.

The previous prime is 1123186885631. The next prime is 1123186885697. The reversal of 1123186885657 is 7565886813211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733731009561 + 389455876096 = 856581^2 + 624064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123186885657 is a prime.

It is a super-2 number, since 2×1123186885657² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123186885595 and 1123186885604.

It is not a weakly prime, because it can be changed into another prime (1123186885697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561593442828 + 561593442829.

It is an arithmetic number, because the mean of its divisors is an integer number (561593442829).

Almost surely, 2^{1123186885657} is an apocalyptic number.

It is an amenable number.

1123186885657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123186885657 is an equidigital number, since it uses as much as digits as its factorization.

1123186885657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19353600, while the sum is 61.

The spelling of 1123186885657 in words is "one trillion, one hundred twenty-three billion, one hundred eighty-six million, eight hundred eighty-five thousand, six hundred fifty-seven".