1216769706720 has 288 divisors, whose sum is σ = 4477373016480. Its totient is φ = 299896750080.

The previous prime is 1216769706709. The next prime is 1216769706769. The reversal of 1216769706720 is 276079676121.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

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, 579412 + ... + 1664108.

It is an arithmetic number, because the mean of its divisors is an integer number (15546434085).

Almost surely, 2^{1216769706720} is an apocalyptic number.

1216769706720 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 1216769706720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2238686508240).

1216769706720 is an abundant number, since it is smaller than the sum of its proper divisors (3260603309760).

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

1216769706720 is a wasteful number, since it uses less digits than its factorization.

1216769706720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084778 (or 1084767 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 1216769706720 in words is "one trillion, two hundred sixteen billion, seven hundred sixty-nine million, seven hundred six thousand, seven hundred twenty".