1280279112218 has 8 divisors (see below), whose sum is σ = 1920429586848. Its totient is φ = 640135916604.

The previous prime is 1280279112209. The next prime is 1280279112269. The reversal of 1280279112218 is 8122119720821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1280279112218² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356446 + ... + 2097737.

It is an arithmetic number, because the mean of its divisors is an integer number (240053698356).

Almost surely, 2^{1280279112218} is an apocalyptic number.

1280279112218 is a deficient number, since it is larger than the sum of its proper divisors (640150474630).

1280279112218 is a wasteful number, since it uses less digits than its factorization.

1280279112218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639508.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 1280279112218 in words is "one trillion, two hundred eighty billion, two hundred seventy-nine million, one hundred twelve thousand, two hundred eighteen".