1999556001104 has 10 divisors (see below), whose sum is σ = 3874139752170. Its totient is φ = 999778000544.

The previous prime is 1999556001101. The next prime is 1999556001137. The reversal of 1999556001104 is 4011006559991.

It can be written as a sum of positive squares in only one way, i.e., 1801103570704 + 198452430400 = 1342052^2 + 445480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999556001101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62486125019 + ... + 62486125050.

It is an arithmetic number, because the mean of its divisors is an integer number (387413975217).

Almost surely, 2^{1999556001104} is an apocalyptic number.

It is an amenable number.

1999556001104 is a deficient number, since it is larger than the sum of its proper divisors (1874583751066).

1999556001104 is a wasteful number, since it uses less digits than its factorization.

1999556001104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124972250077 (or 124972250071 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 50.

The spelling of 1999556001104 in words is "one trillion, nine hundred ninety-nine billion, five hundred fifty-six million, one thousand, one hundred four".