16123362749 has 4 divisors (see below), whose sum is σ = 17363621436. Its totient is φ = 14883104064.

The previous prime is 16123362713. The next prime is 16123362767. The reversal of 16123362749 is 94726332161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8107741849 + 8015620900 = 90043^2 + 89530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16123362749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16123322749) 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, 620129324 + ... + 620129349.

It is an arithmetic number, because the mean of its divisors is an integer number (4340905359).

Almost surely, 2^16123362749 is an apocalyptic number.

It is an amenable number.

16123362749 is a deficient number, since it is larger than the sum of its proper divisors (1240258687).

16123362749 is a wasteful number, since it uses less digits than its factorization.

16123362749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240258686.

The product of its digits is 326592, while the sum is 44.

The spelling of 16123362749 in words is "sixteen billion, one hundred twenty-three million, three hundred sixty-two thousand, seven hundred forty-nine".