11113564578 has 32 divisors (see below), whose sum is σ = 22430882880. Its totient is φ = 3670667520.

The previous prime is 11113564571. The next prime is 11113564619. The reversal of 11113564578 is 87546531111.

It is a super-2 number, since 2×11113564578² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11113564571) 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, 421726 + ... + 447302.

It is an arithmetic number, because the mean of its divisors is an integer number (700965090).

Almost surely, 2^11113564578 is an apocalyptic number.

11113564578 is an abundant number, since it is smaller than the sum of its proper divisors (11317318302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11113564578 is a wasteful number, since it uses less digits than its factorization.

11113564578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26242.

The product of its digits is 100800, while the sum is 42.

The spelling of 11113564578 in words is "eleven billion, one hundred thirteen million, five hundred sixty-four thousand, five hundred seventy-eight".