1128555751 has 2 divisors, whose sum is σ = 1128555752. Its totient is φ = 1128555750.

The previous prime is 1128555737. The next prime is 1128555797. The reversal of 1128555751 is 1575558211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128555751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128555151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564277875 + 564277876.

It is an arithmetic number, because the mean of its divisors is an integer number (564277876).

Almost surely, 2^1128555751 is an apocalyptic number.

1128555751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128555751 is an equidigital number, since it uses as much as digits as its factorization.

1128555751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 40.

The square root of 1128555751 is about 33593.9838512791. The cubic root of 1128555751 is about 1041.1365013652.

The spelling of 1128555751 in words is "one billion, one hundred twenty-eight million, five hundred fifty-five thousand, seven hundred fifty-one".