11151115505 has 16 divisors (see below), whose sum is σ = 13482552384. Its totient is φ = 8853672000.

The previous prime is 11151115499. The next prime is 11151115543. The reversal of 11151115505 is 50551115111.

It is not a de Polignac number, because 11151115505 - 2²⁶ = 11084006641 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 339467 + ... + 370863.

It is an arithmetic number, because the mean of its divisors is an integer number (842659524).

Almost surely, 2^11151115505 is an apocalyptic number.

It is an amenable number.

11151115505 is a deficient number, since it is larger than the sum of its proper divisors (2331436879).

11151115505 is a wasteful number, since it uses less digits than its factorization.

11151115505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31936.

The product of its (nonzero) digits is 625, while the sum is 26.

The spelling of 11151115505 in words is "eleven billion, one hundred fifty-one million, one hundred fifteen thousand, five hundred five".