2116851840 has 128 divisors (see below), whose sum is σ = 7497244800. Its totient is φ = 564489216.

The previous prime is 2116851827. The next prime is 2116851857. The reversal of 2116851840 is 481586112.

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

It is a super-2 number, since 2×2116851840² = 8962123425022771200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2116851795 and 2116851804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43972 + ... + 78531.

It is an arithmetic number, because the mean of its divisors is an integer number (58572225).

Almost surely, 2^2116851840 is an apocalyptic number.

2116851840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116851840 is an abundant number, since it is smaller than the sum of its proper divisors (5380392960).

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

2116851840 is a wasteful number, since it uses less digits than its factorization.

2116851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122531 (or 122513 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 2116851840 is about 46009.2581987582. The cubic root of 2116851840 is about 1283.9954581025.

The spelling of 2116851840 in words is "two billion, one hundred sixteen million, eight hundred fifty-one thousand, eight hundred forty".