52478100261 has 20 divisors (see below), whose sum is σ = 78408431244. Its totient is φ = 34978608000.

The previous prime is 52478100253. The next prime is 52478100281. The reversal of 52478100261 is 16200187425.

52478100261 is a `hidden beast` number, since 524 + 7 + 8 + 100 + 26 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7478963361 + 44999136900 = 86481^2 + 212130^2 .

It is not a de Polignac number, because 52478100261 - 2³ = 52478100253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52478100281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 375661 + ... + 496061.

Almost surely, 2^52478100261 is an apocalyptic number.

It is an amenable number.

52478100261 is a deficient number, since it is larger than the sum of its proper divisors (25930330983).

52478100261 is a wasteful number, since it uses less digits than its factorization.

52478100261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125794 (or 125785 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 52478100261 its reverse (16200187425), we get a palindrome (68678287686).

The spelling of 52478100261 in words is "fifty-two billion, four hundred seventy-eight million, one hundred thousand, two hundred sixty-one".