1999556001103 has 8 divisors (see below), whose sum is σ = 2031336084800. Its totient is φ = 1967937648768.

The previous prime is 1999556001101. The next prime is 1999556001137. The reversal of 1999556001103 is 3011006559991.

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

It is a cyclic number.

It is not a de Polignac number, because 1999556001103 - 2¹ = 1999556001101 is a prime.

It is a Duffinian number.

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 in 7 ways as a sum of consecutive naturals, for example, 40407918 + ... + 40457371.

It is an arithmetic number, because the mean of its divisors is an integer number (253917010600).

Almost surely, 2^{1999556001103} is an apocalyptic number.

1999556001103 is a deficient number, since it is larger than the sum of its proper divisors (31780083697).

1999556001103 is an equidigital number, since it uses as much as digits as its factorization.

1999556001103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80865681.

The product of its (nonzero) digits is 328050, while the sum is 49.

The spelling of 1999556001103 in words is "one trillion, nine hundred ninety-nine billion, five hundred fifty-six million, one thousand, one hundred three".