11121544478 has 8 divisors (see below), whose sum is σ = 18198891000. Its totient is φ = 5055247480.

The previous prime is 11121544463. The next prime is 11121544507. The reversal of 11121544478 is 87444512111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×11121544478³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252762353 + ... + 252762396.

It is an arithmetic number, because the mean of its divisors is an integer number (2274861375).

Almost surely, 2^11121544478 is an apocalyptic number.

11121544478 is a deficient number, since it is larger than the sum of its proper divisors (7077346522).

11121544478 is a wasteful number, since it uses less digits than its factorization.

11121544478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505524762.

The product of its digits is 35840, while the sum is 38.

The spelling of 11121544478 in words is "eleven billion, one hundred twenty-one million, five hundred forty-four thousand, four hundred seventy-eight".