2112457864 has 48 divisors (see below), whose sum is σ = 4415233680. Its totient is φ = 939691680.

The previous prime is 2112457813. The next prime is 2112457873. The reversal of 2112457864 is 4687542112.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188959 + ... + 199825.

It is an arithmetic number, because the mean of its divisors is an integer number (91984035).

Almost surely, 2^2112457864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2112457864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207616840).

2112457864 is an abundant number, since it is smaller than the sum of its proper divisors (2302775816).

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

2112457864 is a wasteful number, since it uses less digits than its factorization.

2112457864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978 (or 10927 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 2112457864 is about 45961.4823955886. The cubic root of 2112457864 is about 1283.1064408609.

Adding to 2112457864 its reverse (4687542112), we get a palindrome (6799999976).

The spelling of 2112457864 in words is "two billion, one hundred twelve million, four hundred fifty-seven thousand, eight hundred sixty-four".