11535509971 has 2 divisors, whose sum is σ = 11535509972. Its totient is φ = 11535509970.

The previous prime is 11535509959. The next prime is 11535510031. The reversal of 11535509971 is 17990553511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11535509971 - 2¹¹ = 11535507923 is a prime.

It is not a weakly prime, because it can be changed into another prime (11535569971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5767754985 + 5767754986.

It is an arithmetic number, because the mean of its divisors is an integer number (5767754986).

Almost surely, 2^11535509971 is an apocalyptic number.

11535509971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11535509971 is an equidigital number, since it uses as much as digits as its factorization.

11535509971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 212625, while the sum is 46.

The spelling of 11535509971 in words is "eleven billion, five hundred thirty-five million, five hundred nine thousand, nine hundred seventy-one".