2545564477 has 2 divisors, whose sum is σ = 2545564478. Its totient is φ = 2545564476.

The previous prime is 2545564471. The next prime is 2545564519. The reversal of 2545564477 is 7744655452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2426449081 + 119115396 = 49259^2 + 10914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545564477 - 2¹⁹ = 2545040189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2545564477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545564471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272782238 + 1272782239.

It is an arithmetic number, because the mean of its divisors is an integer number (1272782239).

Almost surely, 2^2545564477 is an apocalyptic number.

It is an amenable number.

2545564477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545564477 is an equidigital number, since it uses as much as digits as its factorization.

2545564477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704000, while the sum is 49.

The square root of 2545564477 is about 50453.5873551128. The cubic root of 2545564477 is about 1365.4046177137.

The spelling of 2545564477 in words is "two billion, five hundred forty-five million, five hundred sixty-four thousand, four hundred seventy-seven".