16509290803061 has 16 divisors (see below), whose sum is σ = 19703162179584. Its totient is φ = 13525211231664.

The previous prime is 16509290803051. The next prime is 16509290803099. The reversal of 16509290803061 is 16030809290561.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16509290803061 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 (16509290803051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39017645 + ... + 39438498.

It is an arithmetic number, because the mean of its divisors is an integer number (1231447636224).

Almost surely, 2^{16509290803061} is an apocalyptic number.

It is an amenable number.

16509290803061 is a deficient number, since it is larger than the sum of its proper divisors (3193871376523).

16509290803061 is a wasteful number, since it uses less digits than its factorization.

16509290803061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78457480.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 16509290803061 in words is "sixteen trillion, five hundred nine billion, two hundred ninety million, eight hundred three thousand, sixty-one".