16367508491 has 4 divisors (see below), whose sum is σ = 16375681992. Its totient is φ = 16359334992.

The previous prime is 16367508473. The next prime is 16367508517. The reversal of 16367508491 is 19480576361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19480576361 = 13037 ⋅1494253.

It is a cyclic number.

It is not a de Polignac number, because 16367508491 - 2¹⁸ = 16367246347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16367507491) 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, 4083746 + ... + 4087751.

It is an arithmetic number, because the mean of its divisors is an integer number (4093920498).

Almost surely, 2^16367508491 is an apocalyptic number.

16367508491 is a deficient number, since it is larger than the sum of its proper divisors (8173501).

16367508491 is an equidigital number, since it uses as much as digits as its factorization.

16367508491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173500.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 16367508491 in words is "sixteen billion, three hundred sixty-seven million, five hundred eight thousand, four hundred ninety-one".