2778228920849 has 8 divisors (see below), whose sum is σ = 2792262998400. Its totient is φ = 2764195574976.

The previous prime is 2778228920771. The next prime is 2778228920851. The reversal of 2778228920849 is 9480298228772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2778228920849 - 2³⁶ = 2709509444113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2778228920449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8458124 + ... + 8780450.

It is an arithmetic number, because the mean of its divisors is an integer number (349032874800).

Almost surely, 2^{2778228920849} is an apocalyptic number.

It is an amenable number.

2778228920849 is a deficient number, since it is larger than the sum of its proper divisors (14034077551).

2778228920849 is a wasteful number, since it uses less digits than its factorization.

2778228920849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365839.

The product of its (nonzero) digits is 130056192, while the sum is 68.

The spelling of 2778228920849 in words is "two trillion, seven hundred seventy-eight billion, two hundred twenty-eight million, nine hundred twenty thousand, eight hundred forty-nine".