1156765769 has 2 divisors, whose sum is σ = 1156765770. Its totient is φ = 1156765768.

The previous prime is 1156765721. The next prime is 1156765777. The reversal of 1156765769 is 9675676511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966463744 + 190302025 = 31088^2 + 13795^2 .

It is an emirp because it is prime and its reverse (9675676511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156765769 is a prime.

It is a super-2 number, since 2×1156765769² = 2676214088660322722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1156765769.

It is not a weakly prime, because it can be changed into another prime (1156765789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578382884 + 578382885.

It is an arithmetic number, because the mean of its divisors is an integer number (578382885).

Almost surely, 2^1156765769 is an apocalyptic number.

It is an amenable number.

1156765769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156765769 is an equidigital number, since it uses as much as digits as its factorization.

1156765769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 1156765769 is about 34011.2594444840. The cubic root of 1156765769 is about 1049.7401530849.

The spelling of 1156765769 in words is "one billion, one hundred fifty-six million, seven hundred sixty-five thousand, seven hundred sixty-nine".