11055555511 has 32 divisors (see below), whose sum is σ = 15123967488. Its totient is φ = 7801971840.

The previous prime is 11055555499. The next prime is 11055555527. The reversal of 11055555511 is 11555555011.

It is not a de Polignac number, because 11055555511 - 2⁹ = 11055554999 is a prime.

It is a super-2 number, since 2×11055555511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11055555011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51141 + ... + 157246.

It is an arithmetic number, because the mean of its divisors is an integer number (472623984).

Almost surely, 2^11055555511 is an apocalyptic number.

11055555511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11055555511 is a deficient number, since it is larger than the sum of its proper divisors (4068411977).

11055555511 is a wasteful number, since it uses less digits than its factorization.

11055555511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208471.

The product of its (nonzero) digits is 15625, while the sum is 34.

The spelling of 11055555511 in words is "eleven billion, fifty-five million, five hundred fifty-five thousand, five hundred eleven".