2545487709 has 4 divisors (see below), whose sum is σ = 3393983616. Its totient is φ = 1696991804.

The previous prime is 2545487701. The next prime is 2545487723. The reversal of 2545487709 is 9077845452.

It is a happy number.

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 2545487709 - 2³ = 2545487701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545487701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424247949 + ... + 424247954.

It is an arithmetic number, because the mean of its divisors is an integer number (848495904).

Almost surely, 2^2545487709 is an apocalyptic number.

It is an amenable number.

2545487709 is a deficient number, since it is larger than the sum of its proper divisors (848495907).

2545487709 is an equidigital number, since it uses as much as digits as its factorization.

2545487709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848495906.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The square root of 2545487709 is about 50452.8265709663. The cubic root of 2545487709 is about 1365.3908918209.

The spelling of 2545487709 in words is "two billion, five hundred forty-five million, four hundred eighty-seven thousand, seven hundred nine".