16744561613 has 8 divisors (see below), whose sum is σ = 18038781600. Its totient is φ = 15451224048.

The previous prime is 16744561609. The next prime is 16744561667. The reversal of 16744561613 is 31616544761.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16744561613 - 2² = 16744561609 is a prime.

It is a super-2 number, since 2×16744561613² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16744561693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180923 + ... + 257336.

It is an arithmetic number, because the mean of its divisors is an integer number (2254847700).

Almost surely, 2^16744561613 is an apocalyptic number.

16744561613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16744561613 is a deficient number, since it is larger than the sum of its proper divisors (1294219987).

16744561613 is a wasteful number, since it uses less digits than its factorization.

16744561613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441211.

The product of its digits is 362880, while the sum is 44.

The spelling of 16744561613 in words is "sixteen billion, seven hundred forty-four million, five hundred sixty-one thousand, six hundred thirteen".