2778353833 has 2 divisors, whose sum is σ = 2778353834. Its totient is φ = 2778353832.

The previous prime is 2778353821. The next prime is 2778353849. The reversal of 2778353833 is 3383538772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2049191824 + 729162009 = 45268^2 + 27003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778353833 - 2¹³ = 2778345641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2778353803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389176916 + 1389176917.

It is an arithmetic number, because the mean of its divisors is an integer number (1389176917).

Almost surely, 2^2778353833 is an apocalyptic number.

It is an amenable number.

2778353833 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778353833 is an equidigital number, since it uses as much as digits as its factorization.

2778353833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 49.

The square root of 2778353833 is about 52710.0923258535. The cubic root of 2778353833 is about 1405.8182748781.

The spelling of 2778353833 in words is "two billion, seven hundred seventy-eight million, three hundred fifty-three thousand, eight hundred thirty-three".