2581730069 has 4 divisors (see below), whose sum is σ = 2636660544. Its totient is φ = 2526799596.

The previous prime is 2581730057. The next prime is 2581730071. The reversal of 2581730069 is 9600371852.

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 2581730069 - 2²⁴ = 2564952853 is a prime.

It is a super-2 number, since 2×2581730069² = 13330660298357489522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581730029) 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, 27465167 + ... + 27465260.

It is an arithmetic number, because the mean of its divisors is an integer number (659165136).

Almost surely, 2^2581730069 is an apocalyptic number.

It is an amenable number.

2581730069 is a deficient number, since it is larger than the sum of its proper divisors (54930475).

2581730069 is an equidigital number, since it uses as much as digits as its factorization.

2581730069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54930474.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 2581730069 is about 50810.7278928377. The cubic root of 2581730069 is about 1371.8404711356.

The spelling of 2581730069 in words is "two billion, five hundred eighty-one million, seven hundred thirty thousand, sixty-nine".