2520641409 has 16 divisors (see below), whose sum is σ = 3948417984. Its totient is φ = 1410148800.

The previous prime is 2520641399. The next prime is 2520641423. The reversal of 2520641409 is 9041460252.

It is not a de Polignac number, because 2520641409 - 2⁷ = 2520641281 is a prime.

It is a super-2 number, since 2×2520641409² = 12707266225531010562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 2520641409.

It is not an unprimeable number, because it can be changed into a prime (2520641449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2937382 + ... + 2938239.

It is an arithmetic number, because the mean of its divisors is an integer number (246776124).

Almost surely, 2^2520641409 is an apocalyptic number.

It is an amenable number.

2520641409 is a deficient number, since it is larger than the sum of its proper divisors (1427776575).

2520641409 is a wasteful number, since it uses less digits than its factorization.

2520641409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5875648.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2520641409 is about 50205.9897721377. The cubic root of 2520641409 is about 1360.9338685796.

The spelling of 2520641409 in words is "two billion, five hundred twenty million, six hundred forty-one thousand, four hundred nine".