2145642443142 has 32 divisors (see below), whose sum is σ = 4681476290304. Its totient is φ = 650184319200.

The previous prime is 2145642443083. The next prime is 2145642443177. The reversal of 2145642443142 is 2413442465412.

It is a junction number, because it is equal to n+sod(n) for n = 2145642443094 and 2145642443103.

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 15 ways as a sum of consecutive naturals, for example, 4599543 + ... + 5044509.

It is an arithmetic number, because the mean of its divisors is an integer number (146296134072).

Almost surely, 2^{2145642443142} is an apocalyptic number.

2145642443142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2145642443142 is an abundant number, since it is smaller than the sum of its proper divisors (2535833847162).

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

2145642443142 is a wasteful number, since it uses less digits than its factorization.

2145642443142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518044.

The product of its digits is 737280, while the sum is 42.

The spelling of 2145642443142 in words is "two trillion, one hundred forty-five billion, six hundred forty-two million, four hundred forty-three thousand, one hundred forty-two".