16546053655421 has 4 divisors (see below), whose sum is σ = 16553288486592. Its totient is φ = 16538818824252.

The previous prime is 16546053655363. The next prime is 16546053655441. The reversal of 16546053655421 is 12455635064561.

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 a de Polignac number, because none of the positive numbers 2^k-16546053655421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16546053655441) 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, 3617412155 + ... + 3617416728.

It is an arithmetic number, because the mean of its divisors is an integer number (4138322121648).

Almost surely, 2^{16546053655421} is an apocalyptic number.

It is an amenable number.

16546053655421 is a deficient number, since it is larger than the sum of its proper divisors (7234831171).

16546053655421 is an equidigital number, since it uses as much as digits as its factorization.

16546053655421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234831170.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 16546053655421 in words is "sixteen trillion, five hundred forty-six billion, fifty-three million, six hundred fifty-five thousand, four hundred twenty-one".