1916648556 has 12 divisors (see below), whose sum is σ = 4472179992. Its totient is φ = 638882848.

The previous prime is 1916648509. The next prime is 1916648557. The reversal of 1916648556 is 6558466191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1916648499 and 1916648508.

It is not an unprimeable number, because it can be changed into a prime (1916648557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79860345 + ... + 79860368.

It is an arithmetic number, because the mean of its divisors is an integer number (372681666).

Almost surely, 2^1916648556 is an apocalyptic number.

It is an amenable number.

1916648556 is an abundant number, since it is smaller than the sum of its proper divisors (2555531436).

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

1916648556 is a wasteful number, since it uses less digits than its factorization.

1916648556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159720720 (or 159720718 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 1916648556 is about 43779.5449496680. The cubic root of 1916648556 is about 1242.1694064913.

The spelling of 1916648556 in words is "one billion, nine hundred sixteen million, six hundred forty-eight thousand, five hundred fifty-six".