6521075650079 has 2 divisors, whose sum is σ = 6521075650080. Its totient is φ = 6521075650078.

The previous prime is 6521075650073. The next prime is 6521075650091. The reversal of 6521075650079 is 9700565701256.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6521075650079 - 2²⁴ = 6521058872863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6521075650079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6521075650073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260537825039 + 3260537825040.

It is an arithmetic number, because the mean of its divisors is an integer number (3260537825040).

Almost surely, 2^{6521075650079} is an apocalyptic number.

6521075650079 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521075650079 is an equidigital number, since it uses as much as digits as its factorization.

6521075650079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969000, while the sum is 53.

The spelling of 6521075650079 in words is "six trillion, five hundred twenty-one billion, seventy-five million, six hundred fifty thousand, seventy-nine".