1156765801 has 2 divisors, whose sum is σ = 1156765802. Its totient is φ = 1156765800.

The previous prime is 1156765789. The next prime is 1156765807. The reversal of 1156765801 is 1085676511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1041740176 + 115025625 = 32276^2 + 10725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156765801 - 2⁵ = 1156765769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156765807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578382900 + 578382901.

It is an arithmetic number, because the mean of its divisors is an integer number (578382901).

Almost surely, 2^1156765801 is an apocalyptic number.

It is an amenable number.

1156765801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156765801 is an equidigital number, since it uses as much as digits as its factorization.

1156765801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1156765801 is about 34011.2599149164. The cubic root of 1156765801 is about 1049.7401627646.

The spelling of 1156765801 in words is "one billion, one hundred fifty-six million, seven hundred sixty-five thousand, eight hundred one".