2353778549 has 2 divisors, whose sum is σ = 2353778550. Its totient is φ = 2353778548.

The previous prime is 2353778543. The next prime is 2353778551. The reversal of 2353778549 is 9458773532.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2337722500 + 16056049 = 48350^2 + 4007^2 .

It is a cyclic number.

It is not a de Polignac number, because 2353778549 - 2¹⁶ = 2353713013 is a prime.

Together with 2353778551, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2353778549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2353778543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1176889274 + 1176889275.

It is an arithmetic number, because the mean of its divisors is an integer number (1176889275).

Almost surely, 2^2353778549 is an apocalyptic number.

It is an amenable number.

2353778549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2353778549 is an equidigital number, since it uses as much as digits as its factorization.

2353778549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 53.

The square root of 2353778549 is about 48515.7556779238. The cubic root of 2353778549 is about 1330.2150798830.

The spelling of 2353778549 in words is "two billion, three hundred fifty-three million, seven hundred seventy-eight thousand, five hundred forty-nine".