1268998720880 has 160 divisors (see below), whose sum is σ = 3327457529088. Its totient is φ = 446074675200.

The previous prime is 1268998720853. The next prime is 1268998720931. The reversal of 1268998720880 is 880278998621.

It is a super-2 number, since 2×1268998720880² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1268998720880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3497615 + ... + 3843345.

Almost surely, 2^{1268998720880} is an apocalyptic number.

1268998720880 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 1268998720880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663728764544).

1268998720880 is an abundant number, since it is smaller than the sum of its proper divisors (2058458808208).

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

1268998720880 is a wasteful number, since it uses less digits than its factorization.

1268998720880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345895 (or 345889 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 68.

The spelling of 1268998720880 in words is "one trillion, two hundred sixty-eight billion, nine hundred ninety-eight million, seven hundred twenty thousand, eight hundred eighty".