1917023425794 has 40 divisors (see below), whose sum is σ = 4296052741068. Its totient is φ = 638933391360.

The previous prime is 1917023425771. The next prime is 1917023425813. The reversal of 1917023425794 is 4975243207191.

1917023425794 is a `hidden beast` number, since 1 + 9 + 1 + 7 + 0 + 23 + 42 + 579 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1869134668569 + 47888757225 = 1367163^2 + 218835^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1917023425794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 715114 + ... + 2084570.

Almost surely, 2^{1917023425794} is an apocalyptic number.

1917023425794 is an abundant number, since it is smaller than the sum of its proper divisors (2379029315274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1917023425794 is a wasteful number, since it uses less digits than its factorization.

1917023425794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378112 (or 1378103 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

It can be divided in two parts, 19170 and 23425794, that added together give a square (23444964 = 4842²).

The spelling of 1917023425794 in words is "one trillion, nine hundred seventeen billion, twenty-three million, four hundred twenty-five thousand, seven hundred ninety-four".