2520647860 has 12 divisors (see below), whose sum is σ = 5293360548. Its totient is φ = 1008259136.

The previous prime is 2520647849. The next prime is 2520647881. The reversal of 2520647860 is 687460252.

It can be written as a sum of positive squares in 2 ways, for example, as 1511187876 + 1009459984 = 38874^2 + 31772^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63016177 + ... + 63016216.

It is an arithmetic number, because the mean of its divisors is an integer number (441113379).

Almost surely, 2^2520647860 is an apocalyptic number.

2520647860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520647860 is an abundant number, since it is smaller than the sum of its proper divisors (2772712688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2520647860 is a wasteful number, since it uses less digits than its factorization.

2520647860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126032402 (or 126032400 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 2520647860 is about 50206.0540174191. The cubic root of 2520647860 is about 1360.9350295774.

The spelling of 2520647860 in words is "two billion, five hundred twenty million, six hundred forty-seven thousand, eight hundred sixty".