1994199956988 has 144 divisors (see below), whose sum is σ = 4897304294400. Its totient is φ = 631525403520.

The previous prime is 1994199956977. The next prime is 1994199957023. The reversal of 1994199956988 is 8896599914991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 617588958 + ... + 617592186.

It is an arithmetic number, because the mean of its divisors is an integer number (34009057600).

Almost surely, 2^{1994199956988} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994199956988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2448652147200).

1994199956988 is an abundant number, since it is smaller than the sum of its proper divisors (2903104337412).

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

1994199956988 is a wasteful number, since it uses less digits than its factorization.

1994199956988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 3887 counting only the distinct ones).

The product of its digits is 4081466880, while the sum is 87.

The spelling of 1994199956988 in words is "one trillion, nine hundred ninety-four billion, one hundred ninety-nine million, nine hundred fifty-six thousand, nine hundred eighty-eight".