1646858112 has 128 divisors (see below), whose sum is σ = 4468383360. Its totient is φ = 537311232.

The previous prime is 1646858107. The next prime is 1646858113. The reversal of 1646858112 is 2118586461.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646858113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5194978 + ... + 5195294.

It is an arithmetic number, because the mean of its divisors is an integer number (34909245).

Almost surely, 2^1646858112 is an apocalyptic number.

1646858112 is a gapful number since it is divisible by the number (12) 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 1646858112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234191680).

1646858112 is an abundant number, since it is smaller than the sum of its proper divisors (2821525248).

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

1646858112 is a wasteful number, since it uses less digits than its factorization.

1646858112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 568 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 1646858112 is about 40581.4996272932. The cubic root of 1646858112 is about 1180.9152412845.

The spelling of 1646858112 in words is "one billion, six hundred forty-six million, eight hundred fifty-eight thousand, one hundred twelve".