52685511691 has 2 divisors, whose sum is σ = 52685511692. Its totient is φ = 52685511690.

The previous prime is 52685511689. The next prime is 52685511709. The reversal of 52685511691 is 19611558625.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52685511691 - 2¹ = 52685511689 is a prime.

Together with 52685511689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (52685511611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26342755845 + 26342755846.

It is an arithmetic number, because the mean of its divisors is an integer number (26342755846).

Almost surely, 2^52685511691 is an apocalyptic number.

52685511691 is a deficient number, since it is larger than the sum of its proper divisors (1).

52685511691 is an equidigital number, since it uses as much as digits as its factorization.

52685511691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 49.

The spelling of 52685511691 in words is "fifty-two billion, six hundred eighty-five million, five hundred eleven thousand, six hundred ninety-one".