2778873204720 has 160 divisors (see below), whose sum is σ = 8893333647360. Its totient is φ = 717052815360.

The previous prime is 2778873204719. The next prime is 2778873204743. The reversal of 2778873204720 is 274023788772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117294636 + ... + 117318324.

It is an arithmetic number, because the mean of its divisors is an integer number (55583335296).

Almost surely, 2^{2778873204720} is an apocalyptic number.

2778873204720 is a gapful number since it is divisible by the number (20) 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 2778873204720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4446666823680).

2778873204720 is an abundant number, since it is smaller than the sum of its proper divisors (6114460442640).

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

2778873204720 is a wasteful number, since it uses less digits than its factorization.

2778873204720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39503 (or 39497 counting only the distinct ones).

The product of its (nonzero) digits is 14751744, while the sum is 57.

The spelling of 2778873204720 in words is "two trillion, seven hundred seventy-eight billion, eight hundred seventy-three million, two hundred four thousand, seven hundred twenty".