16721677653511 has 8 divisors (see below), whose sum is σ = 17299655385120. Its totient is φ = 16143791132448.

The previous prime is 16721677653497. The next prime is 16721677653517. The reversal of 16721677653511 is 11535677612761.

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 16721677653511 - 2²¹ = 16721675556359 is a prime.

It is a super-2 number, since 2×16721677653511² (a number of 27 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 (16721677653517) 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, 22429536 + ... + 23163061.

It is an arithmetic number, because the mean of its divisors is an integer number (2162456923140).

Almost surely, 2^{16721677653511} is an apocalyptic number.

16721677653511 is a deficient number, since it is larger than the sum of its proper divisors (577977731609).

16721677653511 is a wasteful number, since it uses less digits than its factorization.

16721677653511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45605273.

The product of its digits is 11113200, while the sum is 58.

The spelling of 16721677653511 in words is "sixteen trillion, seven hundred twenty-one billion, six hundred seventy-seven million, six hundred fifty-three thousand, five hundred eleven".