2116556928 has 48 divisors (see below), whose sum is σ = 6090616350. Its totient is φ = 705518592.

The previous prime is 2116556887. The next prime is 2116556941. The reversal of 2116556928 is 8296556112.

2116556928 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 556 + 92 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1964971584 + 151585344 = 44328^2 + 12312^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 917493 + ... + 919796.

Almost surely, 2^2116556928 is an apocalyptic number.

It is an amenable number.

2116556928 is an abundant number, since it is smaller than the sum of its proper divisors (3974059422).

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

2116556928 is a wasteful number, since it uses less digits than its factorization.

2116556928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837309 (or 1837294 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 2116556928 is about 46006.0531669475. The cubic root of 2116556928 is about 1283.9358281610.

The spelling of 2116556928 in words is "two billion, one hundred sixteen million, five hundred fifty-six thousand, nine hundred twenty-eight".