6520223135161 has 8 divisors (see below), whose sum is σ = 6522604614504. Its totient is φ = 6517842024960.

The previous prime is 6520223135159. The next prime is 6520223135183. The reversal of 6520223135161 is 1615313220256.

It can be written as a sum of positive squares in 4 ways, for example, as 3061646059536 + 3458577075625 = 1749756^2 + 1859725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6520223135161 - 2¹ = 6520223135159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6520223135161.

It is not an unprimeable number, because it can be changed into a prime (6520223133161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38076445 + ... + 38247301.

It is an arithmetic number, because the mean of its divisors is an integer number (815325576813).

Almost surely, 2^{6520223135161} is an apocalyptic number.

It is an amenable number.

6520223135161 is a deficient number, since it is larger than the sum of its proper divisors (2381479343).

6520223135161 is a wasteful number, since it uses less digits than its factorization.

6520223135161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184571.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 6520223135161 in words is "six trillion, five hundred twenty billion, two hundred twenty-three million, one hundred thirty-five thousand, one hundred sixty-one".