1099859785512 has 64 divisors (see below), whose sum is σ = 2787259999680. Its totient is φ = 361634606592.

The previous prime is 1099859785483. The next prime is 1099859785523. The reversal of 1099859785512 is 2155879589901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320743 + ... + 1517430.

It is an arithmetic number, because the mean of its divisors is an integer number (43550937495).

Almost surely, 2^{1099859785512} is an apocalyptic number.

1099859785512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1099859785512 is an abundant number, since it is smaller than the sum of its proper divisors (1687400214168).

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

1099859785512 is a wasteful number, since it uses less digits than its factorization.

1099859785512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838522 (or 1838518 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 69.

The spelling of 1099859785512 in words is "one trillion, ninety-nine billion, eight hundred fifty-nine million, seven hundred eighty-five thousand, five hundred twelve".