1916665823925 has 144 divisors (see below), whose sum is σ = 3616095555072. Its totient is φ = 969165388800.

The previous prime is 1916665823923. The next prime is 1916665823929. The reversal of 1916665823925 is 5293285666191.

It is not a de Polignac number, because 1916665823925 - 2¹ = 1916665823923 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916665823921) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 330058372 + ... + 330064178.

It is an arithmetic number, because the mean of its divisors is an integer number (25111774688).

Almost surely, 2^{1916665823925} is an apocalyptic number.

1916665823925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1916665823925 is a deficient number, since it is larger than the sum of its proper divisors (1699429731147).

1916665823925 is a wasteful number, since it uses less digits than its factorization.

1916665823925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868 (or 6860 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 63.

The spelling of 1916665823925 in words is "one trillion, nine hundred sixteen billion, six hundred sixty-five million, eight hundred twenty-three thousand, nine hundred twenty-five".