1818933996640 has 48 divisors (see below), whose sum is σ = 4319497088928. Its totient is φ = 723803774976.

The previous prime is 1818933996629. The next prime is 1818933996641. The reversal of 1818933996640 is 466993398181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818933996641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29420772 + ... + 29482531.

It is an arithmetic number, because the mean of its divisors is an integer number (89989522686).

Almost surely, 2^{1818933996640} is an apocalyptic number.

1818933996640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818933996640 is an abundant number, since it is smaller than the sum of its proper divisors (2500563092288).

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

1818933996640 is a wasteful number, since it uses less digits than its factorization.

1818933996640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58903511 (or 58903503 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 67.

The spelling of 1818933996640 in words is "one trillion, eight hundred eighteen billion, nine hundred thirty-three million, nine hundred ninety-six thousand, six hundred forty".