1279948243563 has 24 divisors (see below), whose sum is σ = 2066080541616. Its totient is φ = 756806054400.

The previous prime is 1279948243547. The next prime is 1279948243577. The reversal of 1279948243563 is 3653428499721.

1279948243563 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 9 + 48 + 24 + 3 + 563 = 666.

It is not a de Polignac number, because 1279948243563 - 2⁴ = 1279948243547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1279948243563.

It is not an unprimeable number, because it can be changed into a prime (1279948243523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157663870 + ... + 157671987.

It is an arithmetic number, because the mean of its divisors is an integer number (86086689234).

Almost surely, 2^{1279948243563} is an apocalyptic number.

1279948243563 is a deficient number, since it is larger than the sum of its proper divisors (786132298053).

1279948243563 is a wasteful number, since it uses less digits than its factorization.

1279948243563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315335915 (or 315335912 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 1279948243563 in words is "one trillion, two hundred seventy-nine billion, nine hundred forty-eight million, two hundred forty-three thousand, five hundred sixty-three".