53520660406399 has 2 divisors, whose sum is σ = 53520660406400. Its totient is φ = 53520660406398.

The previous prime is 53520660406379. The next prime is 53520660406429. The reversal of 53520660406399 is 99360406602535.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53520660406399 - 2¹⁹ = 53520659882111 is a prime.

It is a super-2 number, since 2×53520660406399² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53520660406379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26760330203199 + 26760330203200.

It is an arithmetic number, because the mean of its divisors is an integer number (26760330203200).

Almost surely, 2^{53520660406399} is an apocalyptic number.

53520660406399 is a deficient number, since it is larger than the sum of its proper divisors (1).

53520660406399 is an equidigital number, since it uses as much as digits as its factorization.

53520660406399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31492800, while the sum is 58.

The spelling of 53520660406399 in words is "fifty-three trillion, five hundred twenty billion, six hundred sixty million, four hundred six thousand, three hundred ninety-nine".