11780245165 has 16 divisors (see below), whose sum is σ = 15225966000. Its totient is φ = 8697964032.

The previous prime is 11780245159. The next prime is 11780245187. The reversal of 11780245165 is 56154208711.

11780245165 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 105226564 + 11675018601 = 10258^2 + 108051^2 .

It is a cyclic number.

It is not a de Polignac number, because 11780245165 - 2²⁹ = 11243374253 is a prime.

It is a super-2 number, since 2×11780245165² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 825511 + ... + 839659.

It is an arithmetic number, because the mean of its divisors is an integer number (951622875).

Almost surely, 2^11780245165 is an apocalyptic number.

It is an amenable number.

11780245165 is a deficient number, since it is larger than the sum of its proper divisors (3445720835).

11780245165 is a wasteful number, since it uses less digits than its factorization.

11780245165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26976.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 11780245165 in words is "eleven billion, seven hundred eighty million, two hundred forty-five thousand, one hundred sixty-five".