11787662041 has 3 divisors (see below), whose sum is σ = 11787770613. Its totient is φ = 11787553470.

The previous prime is 11787661999. The next prime is 11787662083. The reversal of 11787662041 is 14026678711.

The square root of 11787662041 is 108571.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14026678711 = 367 ⋅38219833.

It is an interprime number because it is at equal distance from previous prime (11787661999) and next prime (11787662083).

It is not a de Polignac number, because 11787662041 - 2²⁵ = 11754107609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11787662441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 54286 + ... + 162856.

It is an arithmetic number, because the mean of its divisors is an integer number (3929256871).

Almost surely, 2^11787662041 is an apocalyptic number.

11787662041 is the 108571-st square number.

11787662041 is the 54286-th centered octagonal number.

It is an amenable number.

11787662041 is a deficient number, since it is larger than the sum of its proper divisors (108572).

11787662041 is an frugal number, since it uses more digits than its factorization.

11787662041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217142 (or 108571 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 11787662041 in words is "eleven billion, seven hundred eighty-seven million, six hundred sixty-two thousand, forty-one".