16541321653435 has 4 divisors (see below), whose sum is σ = 19849585984128. Its totient is φ = 13233057322744.

The previous prime is 16541321653403. The next prime is 16541321653459. The reversal of 16541321653435 is 53435612314561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16541321653435 - 2⁵ = 16541321653403 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654132165339 + ... + 1654132165348.

It is an arithmetic number, because the mean of its divisors is an integer number (4962396496032).

Almost surely, 2^{16541321653435} is an apocalyptic number.

16541321653435 is a deficient number, since it is larger than the sum of its proper divisors (3308264330693).

16541321653435 is an equidigital number, since it uses as much as digits as its factorization.

16541321653435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308264330692.

The product of its digits is 3888000, while the sum is 49.

Adding to 16541321653435 its reverse (53435612314561), we get a palindrome (69976933967996).

The spelling of 16541321653435 in words is "sixteen trillion, five hundred forty-one billion, three hundred twenty-one million, six hundred fifty-three thousand, four hundred thirty-five".