11551516504471 has 2 divisors, whose sum is σ = 11551516504472. Its totient is φ = 11551516504470.

The previous prime is 11551516504469. The next prime is 11551516504519. The reversal of 11551516504471 is 17440561515511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11551516504471 - 2¹ = 11551516504469 is a prime.

It is a super-3 number, since 3×11551516504471³ (a number of 40 digits) contains 333 as substring.

Together with 11551516504469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11551516504771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775758252235 + 5775758252236.

It is an arithmetic number, because the mean of its divisors is an integer number (5775758252236).

Almost surely, 2^{11551516504471} is an apocalyptic number.

11551516504471 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551516504471 is an equidigital number, since it uses as much as digits as its factorization.

11551516504471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420000, while the sum is 46.

The spelling of 11551516504471 in words is "eleven trillion, five hundred fifty-one billion, five hundred sixteen million, five hundred four thousand, four hundred seventy-one".