11656454021616 has 20 divisors (see below), whose sum is σ = 30112506222632. Its totient is φ = 3885484673856.

The previous prime is 11656454021593. The next prime is 11656454021647. The reversal of 11656454021616 is 61612045465611.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 242842792117 = 11656454021616 / (1 + 1 + 6 + 5 + 6 + 4 + 5 + 4 + 0 + 2 + 1 + 6 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 121421396011 + ... + 121421396106.

Almost surely, 2^{11656454021616} is an apocalyptic number.

11656454021616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11656454021616 is an abundant number, since it is smaller than the sum of its proper divisors (18456052201016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11656454021616 is a wasteful number, since it uses less digits than its factorization.

11656454021616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242842792128 (or 242842792122 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 11656454021616 in words is "eleven trillion, six hundred fifty-six billion, four hundred fifty-four million, twenty-one thousand, six hundred sixteen".