1809868237356 has 48 divisors (see below), whose sum is σ = 4373401939200. Its totient is φ = 581852400192.

The previous prime is 1809868237237. The next prime is 1809868237363. The reversal of 1809868237356 is 6537328689081.

It is a super-2 number, since 2×1809868237356² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2509770 + ... + 3149393.

It is an arithmetic number, because the mean of its divisors is an integer number (91112540400).

Almost surely, 2^{1809868237356} is an apocalyptic number.

It is an amenable number.

1809868237356 is an abundant number, since it is smaller than the sum of its proper divisors (2563533701844).

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

1809868237356 is a wasteful number, since it uses less digits than its factorization.

1809868237356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660118 (or 5660116 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 66.

The spelling of 1809868237356 in words is "one trillion, eight hundred nine billion, eight hundred sixty-eight million, two hundred thirty-seven thousand, three hundred fifty-six".