154249871729 has 2 divisors, whose sum is σ = 154249871730. Its totient is φ = 154249871728.

The previous prime is 154249871689. The next prime is 154249871771. The reversal of 154249871729 is 927178942451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117116581729 + 37133290000 = 342223^2 + 192700^2 .

It is a cyclic number.

It is not a de Polignac number, because 154249871729 - 2²⁰ = 154248823153 is a prime.

It is not a weakly prime, because it can be changed into another prime (154249801729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77124935864 + 77124935865.

It is an arithmetic number, because the mean of its divisors is an integer number (77124935865).

Almost surely, 2^154249871729 is an apocalyptic number.

It is an amenable number.

154249871729 is a deficient number, since it is larger than the sum of its proper divisors (1).

154249871729 is an equidigital number, since it uses as much as digits as its factorization.

154249871729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 59.

The spelling of 154249871729 in words is "one hundred fifty-four billion, two hundred forty-nine million, eight hundred seventy-one thousand, seven hundred twenty-nine".