11657661386247 has 24 divisors (see below), whose sum is σ = 16853309091840. Its totient is φ = 7765099117200.

The previous prime is 11657661386197. The next prime is 11657661386291. The reversal of 11657661386247 is 74268316675611.

11657661386247 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 7 + 6 + 6 + 1 + 386 + 247 = 666.

It is not a de Polignac number, because 11657661386247 - 2⁸ = 11657661385991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11657661386947) 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 23 ways as a sum of consecutive naturals, for example, 189060372 + ... + 189122022.

It is an arithmetic number, because the mean of its divisors is an integer number (702221212160).

Almost surely, 2^{11657661386247} is an apocalyptic number.

11657661386247 is a deficient number, since it is larger than the sum of its proper divisors (5195647705593).

11657661386247 is a wasteful number, since it uses less digits than its factorization.

11657661386247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79363 (or 79360 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 11657661386247 in words is "eleven trillion, six hundred fifty-seven billion, six hundred sixty-one million, three hundred eighty-six thousand, two hundred forty-seven".