6520125240 has 64 divisors (see below), whose sum is σ = 21733754400. Its totient is φ = 1738699776.

The previous prime is 6520125229. The next prime is 6520125247. The reversal of 6520125240 is 425210256.

6520125240 is a `hidden beast` number, since 652 + 0 + 1 + 2 + 5 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520125247) 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, 3017497 + ... + 3019656.

Almost surely, 2^6520125240 is an apocalyptic number.

6520125240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6520125240 is an abundant number, since it is smaller than the sum of its proper divisors (15213629160).

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

6520125240 is a wasteful number, since it uses less digits than its factorization.

6520125240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037173 (or 6037163 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 6520125240 is about 80747.2924623482. The cubic root of 6520125240 is about 1868.1796884006.

Adding to 6520125240 its reverse (425210256), we get a palindrome (6945335496).

The spelling of 6520125240 in words is "six billion, five hundred twenty million, one hundred twenty-five thousand, two hundred forty".