154134020053621 has 2 divisors, whose sum is σ = 154134020053622. Its totient is φ = 154134020053620.

The previous prime is 154134020053523. The next prime is 154134020053669. The reversal of 154134020053621 is 126350020431451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130150335639025 + 23983684414596 = 11408345^2 + 4897314^2 .

It is an emirp because it is prime and its reverse (126350020431451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154134020053621 - 2¹⁷ = 154134019922549 is a prime.

It is a super-2 number, since 2×154134020053621² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154134020053691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77067010026810 + 77067010026811.

It is an arithmetic number, because the mean of its divisors is an integer number (77067010026811).

Almost surely, 2^{154134020053621} is an apocalyptic number.

It is an amenable number.

154134020053621 is a deficient number, since it is larger than the sum of its proper divisors (1).

154134020053621 is an equidigital number, since it uses as much as digits as its factorization.

154134020053621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 154134020053621 in words is "one hundred fifty-four trillion, one hundred thirty-four billion, twenty million, fifty-three thousand, six hundred twenty-one".