1916925663 has 8 divisors (see below), whose sum is σ = 2591899776. Its totient is φ = 1259951000.

The previous prime is 1916925653. The next prime is 1916925679. The reversal of 1916925663 is 3665296191.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1916925663 - 2⁵ = 1916925631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916925623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4499613 + ... + 4500038.

It is an arithmetic number, because the mean of its divisors is an integer number (323987472).

Almost surely, 2^1916925663 is an apocalyptic number.

1916925663 is a deficient number, since it is larger than the sum of its proper divisors (674974113).

1916925663 is an equidigital number, since it uses as much as digits as its factorization.

1916925663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999725.

The product of its digits is 524880, while the sum is 48.

The square root of 1916925663 is about 43782.7096351973. The cubic root of 1916925663 is about 1242.2292674482.

The spelling of 1916925663 in words is "one billion, nine hundred sixteen million, nine hundred twenty-five thousand, six hundred sixty-three".