154144516344661 has 2 divisors, whose sum is σ = 154144516344662. Its totient is φ = 154144516344660.

The previous prime is 154144516344653. The next prime is 154144516344701. The reversal of 154144516344661 is 166443615441451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149157222444036 + 4987293900625 = 12212994^2 + 2233225^2 .

It is a cyclic number.

It is not a de Polignac number, because 154144516344661 - 2³ = 154144516344653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154144516344631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77072258172330 + 77072258172331.

It is an arithmetic number, because the mean of its divisors is an integer number (77072258172331).

Almost surely, 2^{154144516344661} is an apocalyptic number.

It is an amenable number.

154144516344661 is a deficient number, since it is larger than the sum of its proper divisors (1).

154144516344661 is an equidigital number, since it uses as much as digits as its factorization.

154144516344661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16588800, while the sum is 55.

The spelling of 154144516344661 in words is "one hundred fifty-four trillion, one hundred forty-four billion, five hundred sixteen million, three hundred forty-four thousand, six hundred sixty-one".