16510799249 has 4 divisors (see below), whose sum is σ = 18869484864. Its totient is φ = 14152113636.

The previous prime is 16510799231. The next prime is 16510799267. The reversal of 16510799249 is 94299701561.

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.

It is an interprime number because it is at equal distance from previous prime (16510799231) and next prime (16510799267).

It is a cyclic number.

It is not a de Polignac number, because 16510799249 - 2²⁸ = 16242363793 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 16510799249.

It is not an unprimeable number, because it can be changed into a prime (16510793249) 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, 1179342797 + ... + 1179342810.

It is an arithmetic number, because the mean of its divisors is an integer number (4717371216).

Almost surely, 2^16510799249 is an apocalyptic number.

It is an amenable number.

16510799249 is a deficient number, since it is larger than the sum of its proper divisors (2358685615).

16510799249 is an equidigital number, since it uses as much as digits as its factorization.

16510799249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358685614.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 16510799249 in words is "sixteen billion, five hundred ten million, seven hundred ninety-nine thousand, two hundred forty-nine".