1968633518 has 8 divisors (see below), whose sum is σ = 2957738112. Its totient is φ = 982720816.

The previous prime is 1968633497. The next prime is 1968633533. The reversal of 1968633518 is 8153368691.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796430 + ... + 798897.

It is an arithmetic number, because the mean of its divisors is an integer number (369717264).

Almost surely, 2^1968633518 is an apocalyptic number.

1968633518 is a deficient number, since it is larger than the sum of its proper divisors (989104594).

1968633518 is a wasteful number, since it uses less digits than its factorization.

1968633518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595946.

The product of its digits is 933120, while the sum is 50.

The square root of 1968633518 is about 44369.2857503927. The cubic root of 1968633518 is about 1253.2997654136.

The spelling of 1968633518 in words is "one billion, nine hundred sixty-eight million, six hundred thirty-three thousand, five hundred eighteen".