1279561863346 has 32 divisors (see below), whose sum is σ = 2138655375360. Its totient is φ = 570097168704.

The previous prime is 1279561863341. The next prime is 1279561863367. The reversal of 1279561863346 is 6433681659721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1279561863341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3995071 + ... + 4303453.

It is an arithmetic number, because the mean of its divisors is an integer number (66832980480).

Almost surely, 2^{1279561863346} is an apocalyptic number.

1279561863346 is a deficient number, since it is larger than the sum of its proper divisors (859093512014).

1279561863346 is a wasteful number, since it uses less digits than its factorization.

1279561863346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313930.

The product of its digits is 39191040, while the sum is 61.

The spelling of 1279561863346 in words is "one trillion, two hundred seventy-nine billion, five hundred sixty-one million, eight hundred sixty-three thousand, three hundred forty-six".