526685521361 has 2 divisors, whose sum is σ = 526685521362. Its totient is φ = 526685521360.

The previous prime is 526685521357. The next prime is 526685521459. The reversal of 526685521361 is 163125586625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354061890961 + 172623630400 = 595031^2 + 415480^2 .

It is a cyclic number.

It is not a de Polignac number, because 526685521361 - 2² = 526685521357 is a prime.

It is a super-2 number, since 2×526685521361² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (526685551361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263342760680 + 263342760681.

It is an arithmetic number, because the mean of its divisors is an integer number (263342760681).

Almost surely, 2^526685521361 is an apocalyptic number.

It is an amenable number.

526685521361 is a deficient number, since it is larger than the sum of its proper divisors (1).

526685521361 is an equidigital number, since it uses as much as digits as its factorization.

526685521361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592000, while the sum is 50.

The spelling of 526685521361 in words is "five hundred twenty-six billion, six hundred eighty-five million, five hundred twenty-one thousand, three hundred sixty-one".