1968807915 has 24 divisors (see below), whose sum is σ = 3415008480. Its totient is φ = 1049289984.

The previous prime is 1968807899. The next prime is 1968807917. The reversal of 1968807915 is 5197088691.

It is not a de Polignac number, because 1968807915 - 2⁴ = 1968807899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968807917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52314 + ... + 81696.

It is an arithmetic number, because the mean of its divisors is an integer number (142292020).

Almost surely, 2^1968807915 is an apocalyptic number.

1968807915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1968807915 is a deficient number, since it is larger than the sum of its proper divisors (1446200565).

1968807915 is a wasteful number, since it uses less digits than its factorization.

1968807915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30883 (or 30880 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The square root of 1968807915 is about 44371.2509965631. The cubic root of 1968807915 is about 1253.3367733624.

The spelling of 1968807915 in words is "one billion, nine hundred sixty-eight million, eight hundred seven thousand, nine hundred fifteen".