11115552505 has 16 divisors (see below), whose sum is σ = 13571510400. Its totient is φ = 8737361280.

The previous prime is 11115552457. The next prime is 11115552533. The reversal of 11115552505 is 50525551111.

It is a happy number.

It is not a de Polignac number, because 11115552505 - 2¹⁹ = 11115028217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664636 + ... + 681154.

It is an arithmetic number, because the mean of its divisors is an integer number (848219400).

Almost surely, 2^11115552505 is an apocalyptic number.

It is an amenable number.

11115552505 is a deficient number, since it is larger than the sum of its proper divisors (2455957895).

11115552505 is a wasteful number, since it uses less digits than its factorization.

11115552505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18864.

The product of its (nonzero) digits is 6250, while the sum is 31.

The spelling of 11115552505 in words is "eleven billion, one hundred fifteen million, five hundred fifty-two thousand, five hundred five".