53520660446399 has 4 divisors (see below), whose sum is σ = 53540564004480. Its totient is φ = 53500756888320.

The previous prime is 53520660446353. The next prime is 53520660446413. The reversal of 53520660446399 is 99364406602535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53520660446399 - 2¹² = 53520660442303 is a prime.

It is a super-2 number, since 2×53520660446399² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53520660406399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9951775007 + ... + 9951780384.

It is an arithmetic number, because the mean of its divisors is an integer number (13385141001120).

Almost surely, 2^{53520660446399} is an apocalyptic number.

53520660446399 is a deficient number, since it is larger than the sum of its proper divisors (19903558081).

53520660446399 is a wasteful number, since it uses less digits than its factorization.

53520660446399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19903558080.

The product of its (nonzero) digits is 125971200, while the sum is 62.

The spelling of 53520660446399 in words is "fifty-three trillion, five hundred twenty billion, six hundred sixty million, four hundred forty-six thousand, three hundred ninety-nine".