2505021789 has 8 divisors (see below), whose sum is σ = 3340786240. Its totient is φ = 1669635936.

The previous prime is 2505021781. The next prime is 2505021811. The reversal of 2505021789 is 9871205052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2505021789 - 2³ = 2505021781 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 (2505021781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78832 + ... + 105945.

It is an arithmetic number, because the mean of its divisors is an integer number (417598280).

Almost surely, 2^2505021789 is an apocalyptic number.

It is an amenable number.

2505021789 is a deficient number, since it is larger than the sum of its proper divisors (835764451).

2505021789 is a wasteful number, since it uses less digits than its factorization.

2505021789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189299.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 2505021789 is about 50050.1926969317. The cubic root of 2505021789 is about 1358.1169493381.

The spelling of 2505021789 in words is "two billion, five hundred five million, twenty-one thousand, seven hundred eighty-nine".