111401531605 has 48 divisors (see below), whose sum is σ = 168171413760. Its totient is φ = 70217981568.

The previous prime is 111401531503. The next prime is 111401531621. The reversal of 111401531605 is 506135104111.

It is a de Polignac number, because none of the positive numbers 2^k-111401531605 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 688042 + ... + 834388.

It is an arithmetic number, because the mean of its divisors is an integer number (3503571120).

Almost surely, 2^111401531605 is an apocalyptic number.

It is an amenable number.

111401531605 is a deficient number, since it is larger than the sum of its proper divisors (56769882155).

111401531605 is a wasteful number, since it uses less digits than its factorization.

111401531605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146618 (or 146611 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 111401531605 its reverse (506135104111), we get a palindrome (617536635716).

The spelling of 111401531605 in words is "one hundred eleven billion, four hundred one million, five hundred thirty-one thousand, six hundred five".