16505061656079 has 4 divisors (see below), whose sum is σ = 22006748874776. Its totient is φ = 11003374437384.

The previous prime is 16505061656053. The next prime is 16505061656081. The reversal of 16505061656079 is 97065616050561.

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

It is not a de Polignac number, because 16505061656079 - 2¹⁶ = 16505061590543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505062656079) 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, 2750843609344 + ... + 2750843609349.

It is an arithmetic number, because the mean of its divisors is an integer number (5501687218694).

Almost surely, 2^{16505061656079} is an apocalyptic number.

16505061656079 is a deficient number, since it is larger than the sum of its proper divisors (5501687218697).

16505061656079 is an equidigital number, since it uses as much as digits as its factorization.

16505061656079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501687218696.

The product of its (nonzero) digits is 10206000, while the sum is 57.

The spelling of 16505061656079 in words is "sixteen trillion, five hundred five billion, sixty-one million, six hundred fifty-six thousand, seventy-nine".