1299944790720 has 336 divisors, whose sum is σ = 4880922359040. Its totient is φ = 328406731776.

The previous prime is 1299944790671. The next prime is 1299944790811. The reversal of 1299944790720 is 270974499921.

1299944790720 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 94 + 479 + 0 + 72 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1037509 + ... + 1917371.

It is an arithmetic number, because the mean of its divisors is an integer number (14526554640).

Almost surely, 2^{1299944790720} is an apocalyptic number.

1299944790720 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 1299944790720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440461179520).

1299944790720 is an abundant number, since it is smaller than the sum of its proper divisors (3580977568320).

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

1299944790720 is an equidigital number, since it uses as much as digits as its factorization.

1299944790720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879914 (or 879892 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 1299944790720 in words is "one trillion, two hundred ninety-nine billion, nine hundred forty-four million, seven hundred ninety thousand, seven hundred twenty".