1279828099816 has 128 divisors (see below), whose sum is σ = 2880852480000. Its totient is φ = 521152676352.

The previous prime is 1279828099813. The next prime is 1279828099831. The reversal of 1279828099816 is 6189908289721.

It is not an unprimeable number, because it can be changed into a prime (1279828099813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168905820 + ... + 168913396.

It is an arithmetic number, because the mean of its divisors is an integer number (22506660000).

Almost surely, 2^{1279828099816} 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 1279828099816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440426240000).

1279828099816 is an abundant number, since it is smaller than the sum of its proper divisors (1601024380184).

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

1279828099816 is a wasteful number, since it uses less digits than its factorization.

1279828099816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8471 (or 8467 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 70.

The spelling of 1279828099816 in words is "one trillion, two hundred seventy-nine billion, eight hundred twenty-eight million, ninety-nine thousand, eight hundred sixteen".