11655555 has 16 divisors (see below), whose sum is σ = 19153824. Its totient is φ = 6048000.

The previous prime is 11655551. The next prime is 11655563. The reversal of 11655555 is 55555611.

11655555 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11655555 - 2² = 11655551 is a prime.

11655555 is a modest number, since divided by 5555 gives 1165 as remainder.

It is not an unprimeable number, because it can be changed into a prime (11655551) 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, 9946 + ... + 11055.

It is an arithmetic number, because the mean of its divisors is an integer number (1197114).

Almost surely, 2^11655555 is an apocalyptic number.

11655555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11655555 is a deficient number, since it is larger than the sum of its proper divisors (7498269).

11655555 is a wasteful number, since it uses less digits than its factorization.

11655555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21046.

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

The square root of 11655555 is about 3414.0232863881. The cubic root of 11655555 is about 226.7310430851.

The spelling of 11655555 in words is "eleven million, six hundred fifty-five thousand, five hundred fifty-five".