154199208949 has 2 divisors, whose sum is σ = 154199208950. Its totient is φ = 154199208948.

The previous prime is 154199208923. The next prime is 154199208983. The reversal of 154199208949 is 949802991451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129227308324 + 24971900625 = 359482^2 + 158025^2 .

It is a cyclic number.

It is not a de Polignac number, because 154199208949 - 2¹¹ = 154199206901 is a prime.

It is a super-3 number, since 3×154199208949³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154199508949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77099604474 + 77099604475.

It is an arithmetic number, because the mean of its divisors is an integer number (77099604475).

Almost surely, 2^154199208949 is an apocalyptic number.

It is an amenable number.

154199208949 is a deficient number, since it is larger than the sum of its proper divisors (1).

154199208949 is an equidigital number, since it uses as much as digits as its factorization.

154199208949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 61.

The spelling of 154199208949 in words is "one hundred fifty-four billion, one hundred ninety-nine million, two hundred eight thousand, nine hundred forty-nine".