11516510656471 has 4 divisors (see below), whose sum is σ = 11516517460872. Its totient is φ = 11516503852072.

The previous prime is 11516510656463. The next prime is 11516510656493. The reversal of 11516510656471 is 17465601561511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11516510656471 - 2³ = 11516510656463 is a prime.

It is a super-3 number, since 3×11516510656471³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11516510656171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338441 + ... + 4982413.

It is an arithmetic number, because the mean of its divisors is an integer number (2879129365218).

Almost surely, 2^{11516510656471} is an apocalyptic number.

11516510656471 is a deficient number, since it is larger than the sum of its proper divisors (6804401).

11516510656471 is an equidigital number, since it uses as much as digits as its factorization.

11516510656471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804400.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 11516510656471 in words is "eleven trillion, five hundred sixteen billion, five hundred ten million, six hundred fifty-six thousand, four hundred seventy-one".