16611827497 has 4 divisors (see below), whose sum is σ = 16620823296. Its totient is φ = 16602831700.

The previous prime is 16611827489. The next prime is 16611827503. The reversal of 16611827497 is 79472811661.

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 an emirpimes, since its reverse is a distinct semiprime: 79472811661 = 151 ⋅526310011.

It is a cyclic number.

It is not a de Polignac number, because 16611827497 - 2³ = 16611827489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16611827597) 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, 4495129 + ... + 4498822.

It is an arithmetic number, because the mean of its divisors is an integer number (4155205824).

Almost surely, 2^16611827497 is an apocalyptic number.

It is an amenable number.

16611827497 is a deficient number, since it is larger than the sum of its proper divisors (8995799).

16611827497 is an equidigital number, since it uses as much as digits as its factorization.

16611827497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995798.

The product of its digits is 1016064, while the sum is 52.

The spelling of 16611827497 in words is "sixteen billion, six hundred eleven million, eight hundred twenty-seven thousand, four hundred ninety-seven".