154421133505 has 4 divisors (see below), whose sum is σ = 185305360212. Its totient is φ = 123536906800.

The previous prime is 154421133487. The next prime is 154421133509. The reversal of 154421133505 is 505331124451.

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 104395548609 + 50025584896 = 323103^2 + 223664^2 .

It is not a de Polignac number, because 154421133505 - 2⁹ = 154421132993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154421133509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15442113346 + ... + 15442113355.

It is an arithmetic number, because the mean of its divisors is an integer number (46326340053).

Almost surely, 2^154421133505 is an apocalyptic number.

It is an amenable number.

154421133505 is a deficient number, since it is larger than the sum of its proper divisors (30884226707).

154421133505 is an equidigital number, since it uses as much as digits as its factorization.

154421133505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30884226706.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 154421133505 its reverse (505331124451), we get a palindrome (659752257956).

The spelling of 154421133505 in words is "one hundred fifty-four billion, four hundred twenty-one million, one hundred thirty-three thousand, five hundred five".