8128517356061 has 4 divisors (see below), whose sum is σ = 8175503005692. Its totient is φ = 8081531706432.

The previous prime is 8128517356051. The next prime is 8128517356081. The reversal of 8128517356061 is 1606537158218.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7739913484900 + 388603871161 = 2782070^2 + 623381^2 .

It is a cyclic number.

It is not a de Polignac number, because 8128517356061 - 2¹⁰ = 8128517355037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8128517355994 and 8128517356012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128517356051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23492824556 + ... + 23492824901.

It is an arithmetic number, because the mean of its divisors is an integer number (2043875751423).

Almost surely, 2^{8128517356061} is an apocalyptic number.

It is an amenable number.

8128517356061 is a deficient number, since it is larger than the sum of its proper divisors (46985649631).

8128517356061 is a wasteful number, since it uses less digits than its factorization.

8128517356061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46985649630.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 8128517356061 in words is "eight trillion, one hundred twenty-eight billion, five hundred seventeen million, three hundred fifty-six thousand, sixty-one".