6521715005 has 16 divisors (see below), whose sum is σ = 8432546304. Its totient is φ = 4813473600.

The previous prime is 6521715001. The next prime is 6521715017. The reversal of 6521715005 is 5005171256.

It is not a de Polignac number, because 6521715005 - 2² = 6521715001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521715001) 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, 101102 + ... + 152528.

It is an arithmetic number, because the mean of its divisors is an integer number (527034144).

Almost surely, 2^6521715005 is an apocalyptic number.

6521715005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6521715005 is a deficient number, since it is larger than the sum of its proper divisors (1910831299).

6521715005 is a wasteful number, since it uses less digits than its factorization.

6521715005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53396.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 6521715005 is about 80757.1359385658. The cubic root of 6521715005 is about 1868.3315119327.

The spelling of 6521715005 in words is "six billion, five hundred twenty-one million, seven hundred fifteen thousand, five".