1299229735896 has 128 divisors (see below), whose sum is σ = 3698690688000. Its totient is φ = 422442393984.

The previous prime is 1299229735891. The next prime is 1299229735897. The reversal of 1299229735896 is 6985379229921.

1299229735896 is a `hidden beast` number, since 1 + 299 + 229 + 7 + 35 + 89 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299229735891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 957646 + ... + 1874978.

It is an arithmetic number, because the mean of its divisors is an integer number (28896021000).

Almost surely, 2^{1299229735896} 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 1299229735896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849345344000).

1299229735896 is an abundant number, since it is smaller than the sum of its proper divisors (2399460952104).

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

1299229735896 is a wasteful number, since it uses less digits than its factorization.

1299229735896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917510 (or 917500 counting only the distinct ones).

The product of its digits is 264539520, while the sum is 72.

The spelling of 1299229735896 in words is "one trillion, two hundred ninety-nine billion, two hundred twenty-nine million, seven hundred thirty-five thousand, eight hundred ninety-six".