1999107554404 has 27 divisors (see below), whose sum is σ = 3531974052243. Its totient is φ = 990062279928.

The previous prime is 1999107554393. The next prime is 1999107554419. The reversal of 1999107554404 is 4044557019991.

It is a happy number.

The square root of 1999107554404 is 1413898.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 302570869 + ... + 302577475.

Almost surely, 2^{1999107554404} is an apocalyptic number.

1999107554404 is the 1413898-th square number.

It is an amenable number.

1999107554404 is a deficient number, since it is larger than the sum of its proper divisors (1532866497839).

1999107554404 is an frugal number, since it uses more digits than its factorization.

1999107554404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13432 (or 6716 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 1999107554404 in words is "one trillion, nine hundred ninety-nine billion, one hundred seven million, five hundred fifty-four thousand, four hundred four".