1100556599987 has 4 divisors (see below), whose sum is σ = 1185214800000. Its totient is φ = 1015898399976.

The previous prime is 1100556599981. The next prime is 1100556600043. The reversal of 1100556599987 is 7899956550011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1100556599987 - 2¹⁸ = 1100556337843 is a prime.

It is a super-2 number, since 2×1100556599987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100556599981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42329099987 + ... + 42329100012.

It is an arithmetic number, because the mean of its divisors is an integer number (296303700000).

Almost surely, 2^{1100556599987} is an apocalyptic number.

1100556599987 is a deficient number, since it is larger than the sum of its proper divisors (84658200013).

1100556599987 is an equidigital number, since it uses as much as digits as its factorization.

1100556599987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84658200012.

The product of its (nonzero) digits is 30618000, while the sum is 65.

The spelling of 1100556599987 in words is "one trillion, one hundred billion, five hundred fifty-six million, five hundred ninety-nine thousand, nine hundred eighty-seven".