2144615820440 has 32 divisors (see below), whose sum is σ = 4832368850160. Its totient is φ = 856604860800.

The previous prime is 2144615820427. The next prime is 2144615820493. The reversal of 2144615820440 is 440285164412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38767871 + ... + 38823150.

Almost surely, 2^{2144615820440} is an apocalyptic number.

2144615820440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144615820440 is an abundant number, since it is smaller than the sum of its proper divisors (2687753029720).

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

2144615820440 is a wasteful number, since it uses less digits than its factorization.

2144615820440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77591723 (or 77591719 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 41.

The spelling of 2144615820440 in words is "two trillion, one hundred forty-four billion, six hundred fifteen million, eight hundred twenty thousand, four hundred forty".