1918786656 has 96 divisors (see below), whose sum is σ = 5172249600. Its totient is φ = 622550016.

The previous prime is 1918786643. The next prime is 1918786679. The reversal of 1918786656 is 6566878191.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1918786596 and 1918786605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896820 + ... + 898956.

It is an arithmetic number, because the mean of its divisors is an integer number (53877600).

Almost surely, 2^1918786656 is an apocalyptic number.

1918786656 is a gapful number since it is divisible by the number (16) 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 1918786656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2586124800).

1918786656 is an abundant number, since it is smaller than the sum of its proper divisors (3253462944).

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

1918786656 is a wasteful number, since it uses less digits than its factorization.

1918786656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 2388 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The square root of 1918786656 is about 43803.9570815240. The cubic root of 1918786656 is about 1242.6311317998.

The spelling of 1918786656 in words is "one billion, nine hundred eighteen million, seven hundred eighty-six thousand, six hundred fifty-six".