11110431440 has 20 divisors (see below), whose sum is σ = 25831753284. Its totient is φ = 4444172544.

The previous prime is 11110431407. The next prime is 11110431457. The reversal of 11110431440 is 4413401111.

It can be written as a sum of positive squares in 2 ways, for example, as 7652050576 + 3458380864 = 87476^2 + 58808^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 69440117 + ... + 69440276.

Almost surely, 2^11110431440 is an apocalyptic number.

11110431440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11110431440 is an abundant number, since it is smaller than the sum of its proper divisors (14721321844).

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

11110431440 is a wasteful number, since it uses less digits than its factorization.

11110431440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138880406 (or 138880400 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11110431440 its reverse (4413401111), we get a palindrome (15523832551).

The spelling of 11110431440 in words is "eleven billion, one hundred ten million, four hundred thirty-one thousand, four hundred forty".