53821680013 has 2 divisors, whose sum is σ = 53821680014. Its totient is φ = 53821680012.

The previous prime is 53821679999. The next prime is 53821680047. The reversal of 53821680013 is 31008612835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49176167049 + 4645512964 = 221757^2 + 68158^2 .

It is a cyclic number.

It is not a de Polignac number, because 53821680013 - 2⁹ = 53821679501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53821680313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26910840006 + 26910840007.

It is an arithmetic number, because the mean of its divisors is an integer number (26910840007).

Almost surely, 2^53821680013 is an apocalyptic number.

It is an amenable number.

53821680013 is a deficient number, since it is larger than the sum of its proper divisors (1).

53821680013 is an equidigital number, since it uses as much as digits as its factorization.

53821680013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 53821680013 in words is "fifty-three billion, eight hundred twenty-one million, six hundred eighty thousand, thirteen".