53517720416687 has 2 divisors, whose sum is σ = 53517720416688. Its totient is φ = 53517720416686.

The previous prime is 53517720416623. The next prime is 53517720416731. The reversal of 53517720416687 is 78661402771535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53517720416687 - 2⁶ = 53517720416623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53517720416387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26758860208343 + 26758860208344.

It is an arithmetic number, because the mean of its divisors is an integer number (26758860208344).

Almost surely, 2^{53517720416687} is an apocalyptic number.

53517720416687 is a deficient number, since it is larger than the sum of its proper divisors (1).

53517720416687 is an equidigital number, since it uses as much as digits as its factorization.

53517720416687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 53517720416687 in words is "fifty-three trillion, five hundred seventeen billion, seven hundred twenty million, four hundred sixteen thousand, six hundred eighty-seven".