16491835079 has 4 divisors (see below), whose sum is σ = 16518739176. Its totient is φ = 16464930984.

The previous prime is 16491835067. The next prime is 16491835081. The reversal of 16491835079 is 97053819461.

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 16491835079 - 2¹⁶ = 16491769543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16491835079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16491835579) 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, 13451129 + ... + 13452354.

It is an arithmetic number, because the mean of its divisors is an integer number (4129684794).

Almost surely, 2^16491835079 is an apocalyptic number.

16491835079 is a deficient number, since it is larger than the sum of its proper divisors (26904097).

16491835079 is an equidigital number, since it uses as much as digits as its factorization.

16491835079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26904096.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 16491835079 in words is "sixteen billion, four hundred ninety-one million, eight hundred thirty-five thousand, seventy-nine".