1779216122880 has 2112 divisors, whose sum is σ = 7831867852800. Its totient is φ = 381250437120.

The previous prime is 1779216122821. The next prime is 1779216122909. The reversal of 1779216122880 is 882216129771.

1779216122880 is a `hidden beast` number, since 17 + 7 + 9 + 2 + 1 + 612 + 2 + 8 + 8 + 0 = 666.

It is a super-2 number, since 2×1779216122880² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7769502606 + ... + 7769502834.

Almost surely, 2^{1779216122880} is an apocalyptic number.

1779216122880 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 1779216122880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3915933926400).

1779216122880 is an abundant number, since it is smaller than the sum of its proper divisors (6052651729920).

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

1779216122880 is a wasteful number, since it uses less digits than its factorization.

1779216122880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The spelling of 1779216122880 in words is "one trillion, seven hundred seventy-nine billion, two hundred sixteen million, one hundred twenty-two thousand, eight hundred eighty".