2553585781 has 2 divisors, whose sum is σ = 2553585782. Its totient is φ = 2553585780.

The previous prime is 2553585761. The next prime is 2553585803. The reversal of 2553585781 is 1875853552.

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., 1495059556 + 1058526225 = 38666^2 + 32535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553585781 - 2⁷ = 2553585653 is a prime.

It is a super-2 number, since 2×2553585781² = 13041600681850759922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2553585761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276792890 + 1276792891.

It is an arithmetic number, because the mean of its divisors is an integer number (1276792891).

Almost surely, 2^2553585781 is an apocalyptic number.

It is an amenable number.

2553585781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2553585781 is an equidigital number, since it uses as much as digits as its factorization.

2553585781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680000, while the sum is 49.

The square root of 2553585781 is about 50533.0167415325. The cubic root of 2553585781 is about 1366.8372851102.

The spelling of 2553585781 in words is "two billion, five hundred fifty-three million, five hundred eighty-five thousand, seven hundred eighty-one".