11565567651 has 16 divisors (see below), whose sum is σ = 16832815488. Its totient is φ = 7005196800.

The previous prime is 11565567581. The next prime is 11565567659. The reversal of 11565567651 is 15676556511.

11565567651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11565567651 - 2¹⁴ = 11565551267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11565567651.

It is not an unprimeable number, because it can be changed into a prime (11565567659) 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 in 15 ways as a sum of consecutive naturals, for example, 50110 + ... + 160131.

It is an arithmetic number, because the mean of its divisors is an integer number (1052050968).

Almost surely, 2^11565567651 is an apocalyptic number.

11565567651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11565567651 is a deficient number, since it is larger than the sum of its proper divisors (5267247837).

11565567651 is a wasteful number, since it uses less digits than its factorization.

11565567651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211922.

The product of its digits is 945000, while the sum is 48.

The spelling of 11565567651 in words is "eleven billion, five hundred sixty-five million, five hundred sixty-seven thousand, six hundred fifty-one".