6520255416 has 96 divisors (see below), whose sum is σ = 17881914960. Its totient is φ = 2146093056.

The previous prime is 6520255409. The next prime is 6520255439. The reversal of 6520255416 is 6145520256.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4280431 + ... + 4281953.

Almost surely, 2^6520255416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6520255416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8940957480).

6520255416 is an abundant number, since it is smaller than the sum of its proper divisors (11361659544).

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

6520255416 is a wasteful number, since it uses less digits than its factorization.

6520255416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 6520255416 is about 80748.0985286960. The cubic root of 6520255416 is about 1868.1921212160.

The spelling of 6520255416 in words is "six billion, five hundred twenty million, two hundred fifty-five thousand, four hundred sixteen".