16749659523 has 4 divisors (see below), whose sum is σ = 22332879368. Its totient is φ = 11166439680.

The previous prime is 16749659519. The next prime is 16749659527. The reversal of 16749659523 is 32595694761.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16749659519) and next prime (16749659527).

It is not a de Polignac number, because 16749659523 - 2² = 16749659519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16749659527) 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, 2791609918 + ... + 2791609923.

It is an arithmetic number, because the mean of its divisors is an integer number (5583219842).

Almost surely, 2^16749659523 is an apocalyptic number.

16749659523 is a deficient number, since it is larger than the sum of its proper divisors (5583219845).

16749659523 is an equidigital number, since it uses as much as digits as its factorization.

16749659523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583219844.

The product of its digits is 12247200, while the sum is 57.

The spelling of 16749659523 in words is "sixteen billion, seven hundred forty-nine million, six hundred fifty-nine thousand, five hundred twenty-three".