16541321653099 has 4 divisors (see below), whose sum is σ = 17111712054960. Its totient is φ = 15970931251240.

The previous prime is 16541321653037. The next prime is 16541321653127. The reversal of 16541321653099 is 99035612314561.

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 16541321653099 - 2⁹ = 16541321652587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16541321653499) 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, 285195200887 + ... + 285195200944.

It is an arithmetic number, because the mean of its divisors is an integer number (4277928013740).

Almost surely, 2^{16541321653099} is an apocalyptic number.

16541321653099 is a deficient number, since it is larger than the sum of its proper divisors (570390401861).

16541321653099 is an equidigital number, since it uses as much as digits as its factorization.

16541321653099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570390401860.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 16541321653099 in words is "sixteen trillion, five hundred forty-one billion, three hundred twenty-one million, six hundred fifty-three thousand, ninety-nine".