2545940557 has 2 divisors, whose sum is σ = 2545940558. Its totient is φ = 2545940556.

The previous prime is 2545940543. The next prime is 2545940563. The reversal of 2545940557 is 7550495452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2332020681 + 213919876 = 48291^2 + 14626^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545940557 - 2³¹ = 398456909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545940567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272970278 + 1272970279.

It is an arithmetic number, because the mean of its divisors is an integer number (1272970279).

Almost surely, 2^2545940557 is an apocalyptic number.

It is an amenable number.

2545940557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545940557 is an equidigital number, since it uses as much as digits as its factorization.

2545940557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The square root of 2545940557 is about 50457.3142071593. The cubic root of 2545940557 is about 1365.4718557254.

The spelling of 2545940557 in words is "two billion, five hundred forty-five million, nine hundred forty thousand, five hundred fifty-seven".