111436861671444 has 48 divisors (see below), whose sum is σ = 261157630035456. Its totient is φ = 36983124300000.

The previous prime is 111436861671383. The next prime is 111436861671491. The reversal of 111436861671444 is 444176168634111.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 432019 + ... + 14935205.

It is an arithmetic number, because the mean of its divisors is an integer number (5440783959072).

Almost surely, 2^{111436861671444} is an apocalyptic number.

It is an amenable number.

111436861671444 is an abundant number, since it is smaller than the sum of its proper divisors (149720768364012).

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

111436861671444 is a wasteful number, since it uses less digits than its factorization.

111436861671444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14505996 (or 14505994 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 111436861671444 in words is "one hundred eleven trillion, four hundred thirty-six billion, eight hundred sixty-one million, six hundred seventy-one thousand, four hundred forty-four".