1279563876840 has 64 divisors (see below), whose sum is σ = 3843569540160. Its totient is φ = 340783441920.

The previous prime is 1279563876793. The next prime is 1279563876853. The reversal of 1279563876840 is 486783659721.

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 15 ways as a sum of consecutive naturals, for example, 6680041 + ... + 6868920.

It is an arithmetic number, because the mean of its divisors is an integer number (60055774065).

It is a 1-persistent number, because it is pandigital, but 2⋅1279563876840 = 2559127753680 is not.

Almost surely, 2^{1279563876840} is an apocalyptic number.

1279563876840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279563876840 is an abundant number, since it is smaller than the sum of its proper divisors (2564005663320).

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

1279563876840 is a wasteful number, since it uses less digits than its factorization.

1279563876840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13549762 (or 13549758 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 66.

The spelling of 1279563876840 in words is "one trillion, two hundred seventy-nine billion, five hundred sixty-three million, eight hundred seventy-six thousand, eight hundred forty".