2545940549 has 4 divisors (see below), whose sum is σ = 2679937440. Its totient is φ = 2411943660.

The previous prime is 2545940543. The next prime is 2545940557. The reversal of 2545940549 is 9450495452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2545940549 - 2⁴ = 2545940533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545940543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66998417 + ... + 66998454.

It is an arithmetic number, because the mean of its divisors is an integer number (669984360).

Almost surely, 2^2545940549 is an apocalyptic number.

It is an amenable number.

2545940549 is a deficient number, since it is larger than the sum of its proper divisors (133996891).

2545940549 is a wasteful number, since it uses less digits than its factorization.

2545940549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133996890.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The square root of 2545940549 is about 50457.3141278844. The cubic root of 2545940549 is about 1365.4718542952.

The spelling of 2545940549 in words is "two billion, five hundred forty-five million, nine hundred forty thousand, five hundred forty-nine".