1918368256 has 80 divisors (see below), whose sum is σ = 4413663936. Its totient is φ = 815947776.

The previous prime is 1918368253. The next prime is 1918368259. The reversal of 1918368256 is 6528638191.

It is an interprime number because it is at equal distance from previous prime (1918368253) and next prime (1918368259).

It is not an unprimeable number, because it can be changed into a prime (1918368253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489055 + ... + 492961.

Almost surely, 2^1918368256 is an apocalyptic number.

1918368256 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 1918368256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206831968).

1918368256 is an abundant number, since it is smaller than the sum of its proper divisors (2495295680).

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

1918368256 is an equidigital number, since it uses as much as digits as its factorization.

1918368256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069 (or 4053 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 1918368256 is about 43799.1809969091. The cubic root of 1918368256 is about 1242.5408048114.

The spelling of 1918368256 in words is "one billion, nine hundred eighteen million, three hundred sixty-eight thousand, two hundred fifty-six".