1773786121836 has 384 divisors, whose sum is σ = 4945851187200. Its totient is φ = 490965995520.

The previous prime is 1773786121831. The next prime is 1773786121841. The reversal of 1773786121836 is 6381216873771.

It is an interprime number because it is at equal distance from previous prime (1773786121831) and next prime (1773786121841).

It is a self number, because there is not a number n which added to its sum of digits gives 1773786121836.

It is not an unprimeable number, because it can be changed into a prime (1773786121831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 333227871 + ... + 333233193.

It is an arithmetic number, because the mean of its divisors is an integer number (12879820800).

Almost surely, 2^{1773786121836} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1773786121836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472925593600).

1773786121836 is an abundant number, since it is smaller than the sum of its proper divisors (3172065065364).

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

1773786121836 is a wasteful number, since it uses less digits than its factorization.

1773786121836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509 (or 5507 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 60.

The spelling of 1773786121836 in words is "one trillion, seven hundred seventy-three billion, seven hundred eighty-six million, one hundred twenty-one thousand, eight hundred thirty-six".