522160725661 has 4 divisors (see below), whose sum is σ = 522170522332. Its totient is φ = 522150928992.

The previous prime is 522160725629. The next prime is 522160725677. The reversal of 522160725661 is 166527061225.

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 248193276100 + 273967449561 = 498190^2 + 523419^2 .

It is a cyclic number.

It is not a de Polignac number, because 522160725661 - 2⁵ = 522160725629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522160725761) 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, 4817946 + ... + 4925131.

It is an arithmetic number, because the mean of its divisors is an integer number (130542630583).

Almost surely, 2^522160725661 is an apocalyptic number.

It is an amenable number.

522160725661 is a deficient number, since it is larger than the sum of its proper divisors (9796671).

522160725661 is an equidigital number, since it uses as much as digits as its factorization.

522160725661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9796670.

The product of its (nonzero) digits is 302400, while the sum is 43.

Adding to 522160725661 its reverse (166527061225), we get a palindrome (688687786886).

The spelling of 522160725661 in words is "five hundred twenty-two billion, one hundred sixty million, seven hundred twenty-five thousand, six hundred sixty-one".