4552540781 has 2 divisors, whose sum is σ = 4552540782. Its totient is φ = 4552540780.

The previous prime is 4552540777. The next prime is 4552540793. The reversal of 4552540781 is 1870452554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3749725225 + 802815556 = 61235^2 + 28334^2 .

It is a cyclic number.

It is not a de Polignac number, because 4552540781 - 2² = 4552540777 is a prime.

It is a super-2 number, since 2×4552540781² = 41451255125336179922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4552540081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276270390 + 2276270391.

It is an arithmetic number, because the mean of its divisors is an integer number (2276270391).

Almost surely, 2^4552540781 is an apocalyptic number.

It is an amenable number.

4552540781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4552540781 is an equidigital number, since it uses as much as digits as its factorization.

4552540781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224000, while the sum is 41.

The square root of 4552540781 is about 67472.5187094716. The cubic root of 4552540781 is about 1657.3641796728.

The spelling of 4552540781 in words is "four billion, five hundred fifty-two million, five hundred forty thousand, seven hundred eighty-one".