2778228920933 has 2 divisors, whose sum is σ = 2778228920934. Its totient is φ = 2778228920932.

The previous prime is 2778228920851. The next prime is 2778228920969. The reversal of 2778228920933 is 3390298228772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2098621590244 + 679607330689 = 1448662^2 + 824383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778228920933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778228920993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389114460466 + 1389114460467.

It is an arithmetic number, because the mean of its divisors is an integer number (1389114460467).

Almost surely, 2^{2778228920933} is an apocalyptic number.

It is an amenable number.

2778228920933 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778228920933 is an equidigital number, since it uses as much as digits as its factorization.

2778228920933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 2778228920933 in words is "two trillion, seven hundred seventy-eight billion, two hundred twenty-eight million, nine hundred twenty thousand, nine hundred thirty-three".