1128475748261 has 2 divisors, whose sum is σ = 1128475748262. Its totient is φ = 1128475748260.

The previous prime is 1128475748243. The next prime is 1128475748329. The reversal of 1128475748261 is 1628475748211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012048072036 + 116427676225 = 1006006^2 + 341215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128475748261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128475748197 and 1128475748206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128475748201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564237874130 + 564237874131.

It is an arithmetic number, because the mean of its divisors is an integer number (564237874131).

Almost surely, 2^{1128475748261} is an apocalyptic number.

It is an amenable number.

1128475748261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128475748261 is an equidigital number, since it uses as much as digits as its factorization.

1128475748261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6021120, while the sum is 56.

The spelling of 1128475748261 in words is "one trillion, one hundred twenty-eight billion, four hundred seventy-five million, seven hundred forty-eight thousand, two hundred sixty-one".