2501782009 has 4 divisors (see below), whose sum is σ = 2511749520. Its totient is φ = 2491814500.

The previous prime is 2501782007. The next prime is 2501782021. The reversal of 2501782009 is 9002871052.

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 2501782009 - 2¹ = 2501782007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501782007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4983379 + ... + 4983880.

It is an arithmetic number, because the mean of its divisors is an integer number (627937380).

Almost surely, 2^2501782009 is an apocalyptic number.

It is an amenable number.

2501782009 is a deficient number, since it is larger than the sum of its proper divisors (9967511).

2501782009 is an equidigital number, since it uses as much as digits as its factorization.

2501782009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9967510.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 2501782009 is about 50017.8169155752. The cubic root of 2501782009 is about 1357.5312061490.

The spelling of 2501782009 in words is "two billion, five hundred one million, seven hundred eighty-two thousand, nine".