154141321505621 has 2 divisors, whose sum is σ = 154141321505622. Its totient is φ = 154141321505620.

The previous prime is 154141321505513. The next prime is 154141321505629. The reversal of 154141321505621 is 126505123141451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122391871843396 + 31749449662225 = 11063086^2 + 5634665^2 .

It is a cyclic number.

It is not a de Polignac number, because 154141321505621 - 2¹⁴ = 154141321489237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154141321505629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77070660752810 + 77070660752811.

It is an arithmetic number, because the mean of its divisors is an integer number (77070660752811).

Almost surely, 2^{154141321505621} is an apocalyptic number.

It is an amenable number.

154141321505621 is a deficient number, since it is larger than the sum of its proper divisors (1).

154141321505621 is an equidigital number, since it uses as much as digits as its factorization.

154141321505621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 154141321505621 in words is "one hundred fifty-four trillion, one hundred forty-one billion, three hundred twenty-one million, five hundred five thousand, six hundred twenty-one".