12642344780 has 48 divisors (see below), whose sum is σ = 30272991840. Its totient is φ = 4393356288.

The previous prime is 12642344723. The next prime is 12642344801. The reversal of 12642344780 is 8744324621.

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, 1425710 + ... + 1434549.

It is an arithmetic number, because the mean of its divisors is an integer number (630687330).

Almost surely, 2^12642344780 is an apocalyptic number.

12642344780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12642344780 is an abundant number, since it is smaller than the sum of its proper divisors (17630647060).

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

12642344780 is a wasteful number, since it uses less digits than its factorization.

12642344780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860298 (or 2860296 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The spelling of 12642344780 in words is "twelve billion, six hundred forty-two million, three hundred forty-four thousand, seven hundred eighty".