16271005516261 has 4 divisors (see below), whose sum is σ = 16271013601024. Its totient is φ = 16270997431500.

The previous prime is 16271005516253. The next prime is 16271005516319. The reversal of 16271005516261 is 16261550017261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 16271005516261 - 2³ = 16271005516253 is a prime.

It is a super-2 number, since 2×16271005516261² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16271005516861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624786 + ... + 5931436.

It is an arithmetic number, because the mean of its divisors is an integer number (4067753400256).

Almost surely, 2^{16271005516261} is an apocalyptic number.

It is an amenable number.

16271005516261 is a deficient number, since it is larger than the sum of its proper divisors (8084763).

16271005516261 is an equidigital number, since it uses as much as digits as its factorization.

16271005516261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084762.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 16271005516261 in words is "sixteen trillion, two hundred seventy-one billion, five million, five hundred sixteen thousand, two hundred sixty-one".