11780718417 has 18 divisors (see below), whose sum is σ = 18426254262. Its totient is φ = 7249671936.

The previous prime is 11780718373. The next prime is 11780718419. The reversal of 11780718417 is 71481708711.

It can be written as a sum of positive squares in 3 ways, for example, as 47279376 + 11733439041 = 6876^2 + 108321^2 .

It is not a de Polignac number, because 11780718417 - 2⁶ = 11780718353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11780718419) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3871168 + ... + 3874209.

Almost surely, 2^11780718417 is an apocalyptic number.

It is an amenable number.

11780718417 is a deficient number, since it is larger than the sum of its proper divisors (6645535845).

11780718417 is a wasteful number, since it uses less digits than its factorization.

11780718417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7745409 (or 7745393 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 45.

The spelling of 11780718417 in words is "eleven billion, seven hundred eighty million, seven hundred eighteen thousand, four hundred seventeen".