1809121636606 has 32 divisors (see below), whose sum is σ = 2837149283808. Its totient is φ = 864371189760.

The previous prime is 1809121636523. The next prime is 1809121636631. The reversal of 1809121636606 is 6066361219081.

It is a super-3 number, since 3×1809121636606³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1809121636606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2196526 + ... + 2905678.

It is an arithmetic number, because the mean of its divisors is an integer number (88660915119).

Almost surely, 2^{1809121636606} is an apocalyptic number.

1809121636606 is a deficient number, since it is larger than the sum of its proper divisors (1028027647202).

1809121636606 is a wasteful number, since it uses less digits than its factorization.

1809121636606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709836.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 1809121636606 in words is "one trillion, eight hundred nine billion, one hundred twenty-one million, six hundred thirty-six thousand, six hundred six".