1156565651 has 2 divisors, whose sum is σ = 1156565652. Its totient is φ = 1156565650.

The previous prime is 1156565623. The next prime is 1156565653. The reversal of 1156565651 is 1565656511.

It is a strong prime.

It is an emirp because it is prime and its reverse (1565656511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156565651 - 2¹⁰ = 1156564627 is a prime.

Together with 1156565653, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156565599 and 1156565608.

It is not a weakly prime, because it can be changed into another prime (1156565653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578282825 + 578282826.

It is an arithmetic number, because the mean of its divisors is an integer number (578282826).

Almost surely, 2^1156565651 is an apocalyptic number.

1156565651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156565651 is an equidigital number, since it uses as much as digits as its factorization.

1156565651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 41.

The square root of 1156565651 is about 34008.3173797234. The cubic root of 1156565651 is about 1049.6796153279.

The spelling of 1156565651 in words is "one billion, one hundred fifty-six million, five hundred sixty-five thousand, six hundred fifty-one".