1916539008 has 128 divisors (see below), whose sum is σ = 5357448000. Its totient is φ = 606154752.

The previous prime is 1916539003. The next prime is 1916539021. The reversal of 1916539008 is 8009356191.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1916539003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655566 + ... + 658482.

Almost surely, 2^1916539008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916539008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678724000).

1916539008 is an abundant number, since it is smaller than the sum of its proper divisors (3440908992).

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

1916539008 is a wasteful number, since it uses less digits than its factorization.

1916539008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1916539008 is about 43778.2937995532. The cubic root of 1916539008 is about 1242.1457402212.

It can be divided in two parts, 191653 and 9008, that added together give a triangular number (200661 = T₆₃₃).

The spelling of 1916539008 in words is "one billion, nine hundred sixteen million, five hundred thirty-nine thousand, eight".