522620053661 has 4 divisors (see below), whose sum is σ = 522624699324. Its totient is φ = 522615408000.

The previous prime is 522620053607. The next prime is 522620053687. The reversal of 522620053661 is 166350026225.

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 447000553561 + 75619500100 = 668581^2 + 274990^2 .

It is a cyclic number.

It is not a de Polignac number, because 522620053661 - 2¹⁰ = 522620052637 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 (522620653661) 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, 2149790 + ... + 2380511.

It is an arithmetic number, because the mean of its divisors is an integer number (130656174831).

Almost surely, 2^522620053661 is an apocalyptic number.

It is an amenable number.

522620053661 is a deficient number, since it is larger than the sum of its proper divisors (4645663).

522620053661 is a wasteful number, since it uses less digits than its factorization.

522620053661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645662.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 522620053661 its reverse (166350026225), we get a palindrome (688970079886).

The spelling of 522620053661 in words is "five hundred twenty-two billion, six hundred twenty million, fifty-three thousand, six hundred sixty-one".