2545555387 has 2 divisors, whose sum is σ = 2545555388. Its totient is φ = 2545555386.

The previous prime is 2545555379. The next prime is 2545555393. The reversal of 2545555387 is 7835555452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2545555387 - 2³ = 2545555379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2545555387.

It is not a weakly prime, because it can be changed into another prime (2545558387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272777693 + 1272777694.

It is an arithmetic number, because the mean of its divisors is an integer number (1272777694).

Almost surely, 2^2545555387 is an apocalyptic number.

2545555387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545555387 is an equidigital number, since it uses as much as digits as its factorization.

2545555387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200000, while the sum is 49.

The square root of 2545555387 is about 50453.4972722407. The cubic root of 2545555387 is about 1365.4029924628.

The spelling of 2545555387 in words is "two billion, five hundred forty-five million, five hundred fifty-five thousand, three hundred eighty-seven".