2780055533 has 2 divisors, whose sum is σ = 2780055534. Its totient is φ = 2780055532.

The previous prime is 2780055469. The next prime is 2780055637. The reversal of 2780055533 is 3355500872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2288856964 + 491198569 = 47842^2 + 22163^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780055533 - 2⁶ = 2780055469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780055133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390027766 + 1390027767.

It is an arithmetic number, because the mean of its divisors is an integer number (1390027767).

Almost surely, 2^2780055533 is an apocalyptic number.

It is an amenable number.

2780055533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780055533 is an equidigital number, since it uses as much as digits as its factorization.

2780055533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 2780055533 is about 52726.2319249157. The cubic root of 2780055533 is about 1406.1052304948.

The spelling of 2780055533 in words is "two billion, seven hundred eighty million, fifty-five thousand, five hundred thirty-three".