154164413621 has 2 divisors, whose sum is σ = 154164413622. Its totient is φ = 154164413620.

The previous prime is 154164413587. The next prime is 154164413651. The reversal of 154164413621 is 126314461451.

154164413621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135101088721 + 19063324900 = 367561^2 + 138070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154164413621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154164413651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77082206810 + 77082206811.

It is an arithmetic number, because the mean of its divisors is an integer number (77082206811).

Almost surely, 2^154164413621 is an apocalyptic number.

It is an amenable number.

154164413621 is a deficient number, since it is larger than the sum of its proper divisors (1).

154164413621 is an equidigital number, since it uses as much as digits as its factorization.

154164413621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The spelling of 154164413621 in words is "one hundred fifty-four billion, one hundred sixty-four million, four hundred thirteen thousand, six hundred twenty-one".