16517505042749 has 32 divisors (see below), whose sum is σ = 18385326812160. Its totient is φ = 14768835840000.

The previous prime is 16517505042739. The next prime is 16517505042823. The reversal of 16517505042749 is 94724050571561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16517505042749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16517505042694 and 16517505042703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16517505042739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11032829 + ... + 12440189.

It is an arithmetic number, because the mean of its divisors is an integer number (574541462880).

Almost surely, 2^{16517505042749} is an apocalyptic number.

16517505042749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16517505042749 is a deficient number, since it is larger than the sum of its proper divisors (1867821769411).

16517505042749 is a wasteful number, since it uses less digits than its factorization.

16517505042749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407761.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 16517505042749 in words is "sixteen trillion, five hundred seventeen billion, five hundred five million, forty-two thousand, seven hundred forty-nine".