11778770585 has 16 divisors (see below), whose sum is σ = 14193940176. Its totient is φ = 9383470848.

The previous prime is 11778770579. The next prime is 11778770599. The reversal of 11778770585 is 58507787711.

It is a happy number.

11778770585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 7743472009 + 4035298576 = 87997^2 + 63524^2 .

It is a cyclic number.

It is not a de Polignac number, because 11778770585 - 2⁸ = 11778770329 is a prime.

It is a super-2 number, since 2×11778770585² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11778770585.

It is an unprimeable number.

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, 1767119 + ... + 1773771.

It is an arithmetic number, because the mean of its divisors is an integer number (887121261).

Almost surely, 2^11778770585 is an apocalyptic number.

It is an amenable number.

11778770585 is a deficient number, since it is larger than the sum of its proper divisors (2415169591).

11778770585 is a wasteful number, since it uses less digits than its factorization.

11778770585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8092.

The product of its (nonzero) digits is 3841600, while the sum is 56.

The spelling of 11778770585 in words is "eleven billion, seven hundred seventy-eight million, seven hundred seventy thousand, five hundred eighty-five".