11500655505 has 16 divisors (see below), whose sum is σ = 18418921344. Its totient is φ = 6127725440.

The previous prime is 11500655501. The next prime is 11500655549. The reversal of 11500655505 is 50555600511.

It is not a de Polignac number, because 11500655505 - 2² = 11500655501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11500655501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356364 + ... + 387293.

It is an arithmetic number, because the mean of its divisors is an integer number (1151182584).

Almost surely, 2^11500655505 is an apocalyptic number.

11500655505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11500655505 is a deficient number, since it is larger than the sum of its proper divisors (6918265839).

11500655505 is a wasteful number, since it uses less digits than its factorization.

11500655505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744696.

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 11500655505 in words is "eleven billion, five hundred million, six hundred fifty-five thousand, five hundred five".