2505661143 has 4 divisors (see below), whose sum is σ = 3340881528. Its totient is φ = 1670440760.

The previous prime is 2505661141. The next prime is 2505661163. The reversal of 2505661143 is 3411665052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2505661143 - 2¹ = 2505661141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505661141) 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, 417610188 + ... + 417610193.

It is an arithmetic number, because the mean of its divisors is an integer number (835220382).

Almost surely, 2^2505661143 is an apocalyptic number.

2505661143 is a deficient number, since it is larger than the sum of its proper divisors (835220385).

2505661143 is an equidigital number, since it uses as much as digits as its factorization.

2505661143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835220384.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 2505661143 is about 50056.5794176949. The cubic root of 2505661143 is about 1358.2324830825.

The spelling of 2505661143 in words is "two billion, five hundred five million, six hundred sixty-one thousand, one hundred forty-three".