1994512201984 has 81 divisors (see below), whose sum is σ = 4050368545041. Its totient is φ = 980229749760.

The previous prime is 1994512201973. The next prime is 1994512202027. The reversal of 1994512201984 is 4891022154991.

The square root of 1994512201984 is 1412272.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 64857827584 + 1929654374400 = 254672^2 + 1389120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1378376749 + ... + 1378378195.

Almost surely, 2^{1994512201984} is an apocalyptic number.

1994512201984 is the 1412272-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994512201984

1994512201984 is an abundant number, since it is smaller than the sum of its proper divisors (2055856343057).

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

1994512201984 is an frugal number, since it uses more digits than its factorization.

1994512201984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 1994512201984 in words is "one trillion, nine hundred ninety-four billion, five hundred twelve million, two hundred one thousand, nine hundred eighty-four".