2520605861 has 24 divisors (see below), whose sum is σ = 2753657280. Its totient is φ = 2298764160.

The previous prime is 2520605849. The next prime is 2520605887. The reversal of 2520605861 is 1685060252.

2520605861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2520605861 - 2¹⁰ = 2520604837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520605821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5741480 + ... + 5741918.

It is an arithmetic number, because the mean of its divisors is an integer number (114735720).

Almost surely, 2^2520605861 is an apocalyptic number.

It is an amenable number.

2520605861 is a deficient number, since it is larger than the sum of its proper divisors (233051419).

2520605861 is an equidigital number, since it uses as much as digits as its factorization.

2520605861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 2520605861 is about 50205.6357493857. The cubic root of 2520605861 is about 1360.9274709085.

The spelling of 2520605861 in words is "two billion, five hundred twenty million, six hundred five thousand, eight hundred sixty-one".