16541763920681 has 4 divisors (see below), whose sum is σ = 16542293000592. Its totient is φ = 16541234840772.

The previous prime is 16541763920677. The next prime is 16541763920867. The reversal of 16541763920681 is 18602936714561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16541763920681 - 2² = 16541763920677 is a prime.

It is a super-2 number, since 2×16541763920681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16541763920681.

It is not an unprimeable number, because it can be changed into a prime (16541763920651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264493055 + ... + 264555588.

It is an arithmetic number, because the mean of its divisors is an integer number (4135573250148).

It is a 1-persistent number, because it is pandigital, but 2⋅16541763920681 = 33083527841362 is not.

Almost surely, 2^{16541763920681} is an apocalyptic number.

It is an amenable number.

16541763920681 is a deficient number, since it is larger than the sum of its proper divisors (529079911).

16541763920681 is an equidigital number, since it uses as much as digits as its factorization.

16541763920681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529079910.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 16541763920681 in words is "sixteen trillion, five hundred forty-one billion, seven hundred sixty-three million, nine hundred twenty thousand, six hundred eighty-one".