154145405149 has 2 divisors, whose sum is σ = 154145405150. Its totient is φ = 154145405148.

The previous prime is 154145405129. The next prime is 154145405177. The reversal of 154145405149 is 941504541451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127627562500 + 26517842649 = 357250^2 + 162843^2 .

It is a cyclic number.

It is not a de Polignac number, because 154145405149 - 2¹³ = 154145396957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154145405129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77072702574 + 77072702575.

It is an arithmetic number, because the mean of its divisors is an integer number (77072702575).

Almost surely, 2^154145405149 is an apocalyptic number.

It is an amenable number.

154145405149 is a deficient number, since it is larger than the sum of its proper divisors (1).

154145405149 is an equidigital number, since it uses as much as digits as its factorization.

154145405149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 154145405149 in words is "one hundred fifty-four billion, one hundred forty-five million, four hundred five thousand, one hundred forty-nine".