2144900447820 has 144 divisors (see below), whose sum is σ = 7095367493760. Its totient is φ = 521292215808.

The previous prime is 2144900447813. The next prime is 2144900447867. The reversal of 2144900447820 is 287440094412.

2144900447820 is a `hidden beast` number, since 2 + 1 + 44 + 90 + 0 + 447 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 5616559 + ... + 5986278.

Almost surely, 2^{2144900447820} is an apocalyptic number.

2144900447820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144900447820 is an abundant number, since it is smaller than the sum of its proper divisors (4950467045940).

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

2144900447820 is a wasteful number, since it uses less digits than its factorization.

2144900447820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602944 (or 11602939 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 2144900447820 in words is "two trillion, one hundred forty-four billion, nine hundred million, four hundred forty-seven thousand, eight hundred twenty".