6520414545 has 20 divisors (see below), whose sum is σ = 11688447540. Its totient is φ = 3477554208.

The previous prime is 6520414529. The next prime is 6520414561. The reversal of 6520414545 is 5454140256.

It is an interprime number because it is at equal distance from previous prime (6520414529) and next prime (6520414561).

It can be written as a sum of positive squares in 2 ways, for example, as 3928280976 + 2592133569 = 62676^2 + 50913^2 .

It is not a de Polignac number, because 6520414545 - 2⁴ = 6520414529 is a prime.

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 19 ways as a sum of consecutive naturals, for example, 8049490 + ... + 8050299.

It is an arithmetic number, because the mean of its divisors is an integer number (584422377).

Almost surely, 2^6520414545 is an apocalyptic number.

It is an amenable number.

6520414545 is a deficient number, since it is larger than the sum of its proper divisors (5168032995).

6520414545 is a wasteful number, since it uses less digits than its factorization.

6520414545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16099806 (or 16099797 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 6520414545 is about 80749.0838647721. The cubic root of 6520414545 is about 1868.2073190422.

The spelling of 6520414545 in words is "six billion, five hundred twenty million, four hundred fourteen thousand, five hundred forty-five".