1916678366625 has 64 divisors (see below), whose sum is σ = 3485165688576. Its totient is φ = 927730304000.

The previous prime is 1916678366587. The next prime is 1916678366653. The reversal of 1916678366625 is 5266638766191.

It is not a de Polignac number, because 1916678366625 - 2¹¹ = 1916678364577 is a prime.

It is a super-2 number, since 2×1916678366625² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2054347 + ... + 2837903.

It is an arithmetic number, because the mean of its divisors is an integer number (54455713884).

Almost surely, 2^{1916678366625} is an apocalyptic number.

1916678366625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1916678366625 is a deficient number, since it is larger than the sum of its proper divisors (1568487321951).

1916678366625 is a wasteful number, since it uses less digits than its factorization.

1916678366625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784179 (or 784169 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 66.

The spelling of 1916678366625 in words is "one trillion, nine hundred sixteen billion, six hundred seventy-eight million, three hundred sixty-six thousand, six hundred twenty-five".