2145143689920 has 336 divisors, whose sum is σ = 9199045709568. Its totient is φ = 445744097280.

The previous prime is 2145143689903. The next prime is 2145143690009. The reversal of 2145143689920 is 299863415412.

It is a happy number.

2145143689920 is a `hidden beast` number, since 2 + 1 + 4 + 514 + 36 + 8 + 9 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

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 47 ways as a sum of consecutive naturals, for example, 4614874 + ... + 5058393.

Almost surely, 2^{2145143689920} is an apocalyptic number.

2145143689920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145143689920 is an abundant number, since it is smaller than the sum of its proper divisors (7053902019648).

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

2145143689920 is a wasteful number, since it uses less digits than its factorization.

2145143689920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9673308 (or 9673295 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 2145143689920 in words is "two trillion, one hundred forty-five billion, one hundred forty-three million, six hundred eighty-nine thousand, nine hundred twenty".