1279243161600 has 312 divisors, whose sum is σ = 4262947630080. Its totient is φ = 338435112960.

The previous prime is 1279243161571. The next prime is 1279243161619. The reversal of 1279243161600 is 61613429721.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38998006 + ... + 39030794.

Almost surely, 2^{1279243161600} is an apocalyptic number.

1279243161600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279243161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131473815040).

1279243161600 is an abundant number, since it is smaller than the sum of its proper divisors (2983704468480).

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

1279243161600 is a wasteful number, since it uses less digits than its factorization.

1279243161600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32953 (or 32926 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 1279243161600 in words is "one trillion, two hundred seventy-nine billion, two hundred forty-three million, one hundred sixty-one thousand, six hundred".