16001680536577 has 8 divisors (see below), whose sum is σ = 16942998624552. Its totient is φ = 15060367200000.

The previous prime is 16001680536547. The next prime is 16001680536599. The reversal of 16001680536577 is 77563508610061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13439196734401 + 2562483802176 = 3665951^2 + 1600776^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16001680536577 - 2¹¹ = 16001680534529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16001680536547) 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, 7605927 + ... + 9479107.

It is an arithmetic number, because the mean of its divisors is an integer number (2117874828069).

Almost surely, 2^{16001680536577} is an apocalyptic number.

16001680536577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16001680536577 is a deficient number, since it is larger than the sum of its proper divisors (941318087975).

16001680536577 is a wasteful number, since it uses less digits than its factorization.

16001680536577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375699.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 16001680536577 in words is "sixteen trillion, one billion, six hundred eighty million, five hundred thirty-six thousand, five hundred seventy-seven".