5631111816 has 32 divisors (see below), whose sum is σ = 15357578400. Its totient is φ = 1706397440.

The previous prime is 5631111737. The next prime is 5631111821. The reversal of 5631111816 is 6181111365.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10664721 + ... + 10665248.

It is an arithmetic number, because the mean of its divisors is an integer number (479924325).

Almost surely, 2^5631111816 is an apocalyptic number.

It is an amenable number.

5631111816 is an abundant number, since it is smaller than the sum of its proper divisors (9726466584).

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

5631111816 is a wasteful number, since it uses less digits than its factorization.

5631111816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21329989 (or 21329985 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 5631111816 is about 75040.7343780696. The cubic root of 5631111816 is about 1779.0905399091.

The spelling of 5631111816 in words is "five billion, six hundred thirty-one million, one hundred eleven thousand, eight hundred sixteen".