2111550864 has 80 divisors (see below), whose sum is σ = 5927239680. Its totient is φ = 645287040.

The previous prime is 2111550829. The next prime is 2111550877. The reversal of 2111550864 is 4680551112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9072 + ... + 65615.

It is an arithmetic number, because the mean of its divisors is an integer number (74090496).

Almost surely, 2^2111550864 is an apocalyptic number.

2111550864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111550864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2963619840).

2111550864 is an abundant number, since it is smaller than the sum of its proper divisors (3815688816).

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

2111550864 is a wasteful number, since it uses less digits than its factorization.

2111550864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74748 (or 74742 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 2111550864 is about 45951.6143786048. The cubic root of 2111550864 is about 1282.9227773726.

The spelling of 2111550864 in words is "two billion, one hundred eleven million, five hundred fifty thousand, eight hundred sixty-four".