16506397607 has 4 divisors (see below), whose sum is σ = 18864454416. Its totient is φ = 14148340800.

The previous prime is 16506397601. The next prime is 16506397651. The reversal of 16506397607 is 70679360561.

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 16506397607 - 2¹⁰ = 16506396583 is a prime.

It is a super-2 number, since 2×16506397607² (a number of 21 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 (16506397601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179028394 + ... + 1179028407.

It is an arithmetic number, because the mean of its divisors is an integer number (4716113604).

Almost surely, 2^16506397607 is an apocalyptic number.

16506397607 is a deficient number, since it is larger than the sum of its proper divisors (2358056809).

16506397607 is an equidigital number, since it uses as much as digits as its factorization.

16506397607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358056808.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The spelling of 16506397607 in words is "sixteen billion, five hundred six million, three hundred ninety-seven thousand, six hundred seven".