16612653866271 has 4 divisors (see below), whose sum is σ = 22150205155032. Its totient is φ = 11075102577512.

The previous prime is 16612653866261. The next prime is 16612653866317. The reversal of 16612653866271 is 17266835621661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16612653866271 - 2²³ = 16612645477663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16612653866261) 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, 2768775644376 + ... + 2768775644381.

It is an arithmetic number, because the mean of its divisors is an integer number (5537551288758).

Almost surely, 2^{16612653866271} is an apocalyptic number.

16612653866271 is a deficient number, since it is larger than the sum of its proper divisors (5537551288761).

16612653866271 is an equidigital number, since it uses as much as digits as its factorization.

16612653866271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5537551288760.

The product of its digits is 26127360, while the sum is 60.

The spelling of 16612653866271 in words is "sixteen trillion, six hundred twelve billion, six hundred fifty-three million, eight hundred sixty-six thousand, two hundred seventy-one".