1994834163558 has 8 divisors (see below), whose sum is σ = 3989668327128. Its totient is φ = 664944721184.

The previous prime is 1994834163551. The next prime is 1994834163559. The reversal of 1994834163558 is 8553614384991.

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

1994834163558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994834163551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166236180291 + ... + 166236180302.

It is an arithmetic number, because the mean of its divisors is an integer number (498708540891).

Almost surely, 2^{1994834163558} is an apocalyptic number.

1994834163558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1994834163558 is a wasteful number, since it uses less digits than its factorization.

1994834163558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332472360598.

The product of its digits is 111974400, while the sum is 66.

The spelling of 1994834163558 in words is "one trillion, nine hundred ninety-four billion, eight hundred thirty-four million, one hundred sixty-three thousand, five hundred fifty-eight".