11523516212661 has 16 divisors (see below), whose sum is σ = 15529724683200. Its totient is φ = 7599893672448.

The previous prime is 11523516212657. The next prime is 11523516212683. The reversal of 11523516212661 is 16621261532511.

It is not a de Polignac number, because 11523516212661 - 2² = 11523516212657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523516212651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7784446 + ... + 9145743.

It is an arithmetic number, because the mean of its divisors is an integer number (970607792700).

Almost surely, 2^{11523516212661} is an apocalyptic number.

It is an amenable number.

11523516212661 is a deficient number, since it is larger than the sum of its proper divisors (4006208470539).

11523516212661 is a wasteful number, since it uses less digits than its factorization.

11523516212661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16932628.

The product of its digits is 129600, while the sum is 42.

The spelling of 11523516212661 in words is "eleven trillion, five hundred twenty-three billion, five hundred sixteen million, two hundred twelve thousand, six hundred sixty-one".