6521260512 has 48 divisors (see below), whose sum is σ = 18435105360. Its totient is φ = 2006541312.

The previous prime is 6521260507. The next prime is 6521260523. The reversal of 6521260512 is 2150621256.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6521260512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611437 + ... + 2613932.

It is an arithmetic number, because the mean of its divisors is an integer number (384064695).

Almost surely, 2^6521260512 is an apocalyptic number.

It is an amenable number.

6521260512 is an abundant number, since it is smaller than the sum of its proper divisors (11913844848).

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

6521260512 is a wasteful number, since it uses less digits than its factorization.

6521260512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225395 (or 5225387 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 6521260512 is about 80754.3219400671. The cubic root of 6521260512 is about 1868.2881100914.

Adding to 6521260512 its reverse (2150621256), we get a palindrome (8671881768).

The spelling of 6521260512 in words is "six billion, five hundred twenty-one million, two hundred sixty thousand, five hundred twelve".