16333621541 has 4 divisors (see below), whose sum is σ = 16896849900. Its totient is φ = 15770393184.

The previous prime is 16333621523. The next prime is 16333621571. The reversal of 16333621541 is 14512633361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6202192516 + 10131429025 = 78754^2 + 100655^2 .

It is a cyclic number.

It is not a de Polignac number, because 16333621541 - 2¹⁰ = 16333620517 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 (16333621571) 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, 281614136 + ... + 281614193.

It is an arithmetic number, because the mean of its divisors is an integer number (4224212475).

Almost surely, 2^16333621541 is an apocalyptic number.

It is an amenable number.

16333621541 is a deficient number, since it is larger than the sum of its proper divisors (563228359).

16333621541 is an equidigital number, since it uses as much as digits as its factorization.

16333621541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563228358.

The product of its digits is 38880, while the sum is 35.

The spelling of 16333621541 in words is "sixteen billion, three hundred thirty-three million, six hundred twenty-one thousand, five hundred forty-one".