11663722655 has 16 divisors (see below), whose sum is σ = 15097059264. Its totient is φ = 8599530240.

The previous prime is 11663722649. The next prime is 11663722669. The reversal of 11663722655 is 55622736611.

It is a happy number.

It is not a de Polignac number, because 11663722655 - 2²² = 11659528351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101174 + ... + 183203.

It is an arithmetic number, because the mean of its divisors is an integer number (943566204).

Almost surely, 2^11663722655 is an apocalyptic number.

11663722655 is a deficient number, since it is larger than the sum of its proper divisors (3433336609).

11663722655 is a wasteful number, since it uses less digits than its factorization.

11663722655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285026.

The product of its digits is 453600, while the sum is 44.

The spelling of 11663722655 in words is "eleven billion, six hundred sixty-three million, seven hundred twenty-two thousand, six hundred fifty-five".