1820549984952 has 128 divisors (see below), whose sum is σ = 4719701448000. Its totient is φ = 584509685760.

The previous prime is 1820549984873. The next prime is 1820549985029. The reversal of 1820549984952 is 2594899450281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 777679302 + ... + 777681642.

Almost surely, 2^{1820549984952} is an apocalyptic number.

1820549984952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820549984952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359850724000).

1820549984952 is an abundant number, since it is smaller than the sum of its proper divisors (2899151463048).

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

1820549984952 is a wasteful number, since it uses less digits than its factorization.

1820549984952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 66.

The spelling of 1820549984952 in words is "one trillion, eight hundred twenty billion, five hundred forty-nine million, nine hundred eighty-four thousand, nine hundred fifty-two".