2116955646 has 24 divisors (see below), whose sum is σ = 4939563720. Its totient is φ = 651370896.

The previous prime is 2116955641. The next prime is 2116955669. The reversal of 2116955646 is 6465596112.

2116955646 is a `hidden beast` number, since 21 + 1 + 69 + 5 + 564 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116955641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4523176 + ... + 4523643.

It is an arithmetic number, because the mean of its divisors is an integer number (205815155).

Almost surely, 2^2116955646 is an apocalyptic number.

2116955646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2116955646 is an abundant number, since it is smaller than the sum of its proper divisors (2822608074).

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

2116955646 is a wasteful number, since it uses less digits than its factorization.

2116955646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046840 (or 9046837 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 2116955646 is about 46010.3862839685. The cubic root of 2116955646 is about 1284.0164459127.

The spelling of 2116955646 in words is "two billion, one hundred sixteen million, nine hundred fifty-five thousand, six hundred forty-six".