16497756749 has 4 divisors (see below), whose sum is σ = 16508206560. Its totient is φ = 16487306940.

The previous prime is 16497756713. The next prime is 16497756761. The reversal of 16497756749 is 94765779461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94765779461 = 11677 ⋅8115593.

It is a cyclic number.

It is not a de Polignac number, because 16497756749 - 2¹² = 16497752653 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 (16497756349) 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, 5222537 + ... + 5225694.

It is an arithmetic number, because the mean of its divisors is an integer number (4127051640).

Almost surely, 2^16497756749 is an apocalyptic number.

It is an amenable number.

16497756749 is a deficient number, since it is larger than the sum of its proper divisors (10449811).

16497756749 is a wasteful number, since it uses less digits than its factorization.

16497756749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10449810.

The product of its digits is 80015040, while the sum is 65.

The spelling of 16497756749 in words is "sixteen billion, four hundred ninety-seven million, seven hundred fifty-six thousand, seven hundred forty-nine".