154421133509 has 2 divisors, whose sum is σ = 154421133510. Its totient is φ = 154421133508.

The previous prime is 154421133487. The next prime is 154421133533. The reversal of 154421133509 is 905331124451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154126908100 + 294225409 = 392590^2 + 17153^2 .

It is a cyclic number.

It is not a de Polignac number, because 154421133509 - 2¹² = 154421129413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154421733509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77210566754 + 77210566755.

It is an arithmetic number, because the mean of its divisors is an integer number (77210566755).

Almost surely, 2^154421133509 is an apocalyptic number.

It is an amenable number.

154421133509 is a deficient number, since it is larger than the sum of its proper divisors (1).

154421133509 is an equidigital number, since it uses as much as digits as its factorization.

154421133509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 154421133509 in words is "one hundred fifty-four billion, four hundred twenty-one million, one hundred thirty-three thousand, five hundred nine".