1881815122000 has 80 divisors (see below), whose sum is σ = 4963886201664. Its totient is φ = 684296400000.

The previous prime is 1881815121997. The next prime is 1881815122001. The reversal of 1881815122000 is 2215181881.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881815122001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42746526 + ... + 42790525.

Almost surely, 2^{1881815122000} is an apocalyptic number.

1881815122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881815122000 is an abundant number, since it is smaller than the sum of its proper divisors (3082071079664).

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

1881815122000 is a wasteful number, since it uses less digits than its factorization.

1881815122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85537085 (or 85537069 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 37.

The spelling of 1881815122000 in words is "one trillion, eight hundred eighty-one billion, eight hundred fifteen million, one hundred twenty-two thousand".