1279982340208 has 360 divisors, whose sum is σ = 3097031888384. Its totient is φ = 508987100160.

The previous prime is 1279982340199. The next prime is 1279982340227. The reversal of 1279982340208 is 8020432899721.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1690861366 + ... + 1690862122.

Almost surely, 2^{1279982340208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279982340208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548515944192).

1279982340208 is an abundant number, since it is smaller than the sum of its proper divisors (1817049548176).

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

1279982340208 is a wasteful number, since it uses less digits than its factorization.

1279982340208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1279982340208 in words is "one trillion, two hundred seventy-nine billion, nine hundred eighty-two million, three hundred forty thousand, two hundred eight".