2545783771 has 2 divisors, whose sum is σ = 2545783772. Its totient is φ = 2545783770.

The previous prime is 2545783733. The next prime is 2545783781. The reversal of 2545783771 is 1773875452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2545783771 - 2⁹ = 2545783259 is a prime.

It is not a weakly prime, because it can be changed into another prime (2545783781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272891885 + 1272891886.

It is an arithmetic number, because the mean of its divisors is an integer number (1272891886).

Almost surely, 2^2545783771 is an apocalyptic number.

2545783771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545783771 is an equidigital number, since it uses as much as digits as its factorization.

2545783771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1646400, while the sum is 49.

The square root of 2545783771 is about 50455.7605333623. The cubic root of 2545783771 is about 1365.4438253165.

It can be divided in two parts, 254 and 5783771, that added together give a square (5784025 = 2405²).

The spelling of 2545783771 in words is "two billion, five hundred forty-five million, seven hundred eighty-three thousand, seven hundred seventy-one".