154486189993 has 2 divisors, whose sum is σ = 154486189994. Its totient is φ = 154486189992.

The previous prime is 154486189939. The next prime is 154486190051. The reversal of 154486189993 is 399981684451.

154486189993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (154486189939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146656063849 + 7830126144 = 382957^2 + 88488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154486189993 is a prime.

It is not a weakly prime, because it can be changed into another prime (154486189493) 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, 77243094996 + 77243094997.

It is an arithmetic number, because the mean of its divisors is an integer number (77243094997).

Almost surely, 2^154486189993 is an apocalyptic number.

It is an amenable number.

154486189993 is a deficient number, since it is larger than the sum of its proper divisors (1).

154486189993 is an equidigital number, since it uses as much as digits as its factorization.

154486189993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67184640, while the sum is 67.

The spelling of 154486189993 in words is "one hundred fifty-four billion, four hundred eighty-six million, one hundred eighty-nine thousand, nine hundred ninety-three".