154200820129 has 4 divisors (see below), whose sum is σ = 154202134660. Its totient is φ = 154199505600.

The previous prime is 154200820057. The next prime is 154200820187. The reversal of 154200820129 is 921028002451.

154200820129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921028002451 = 4273 ⋅215545987.

It can be written as a sum of positive squares in 2 ways, for example, as 67675421025 + 86525399104 = 260145^2 + 294152^2 .

It is a cyclic number.

It is not a de Polignac number, because 154200820129 - 2¹⁷ = 154200689057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154200820094 and 154200820103.

It is not an unprimeable number, because it can be changed into a prime (154200829129) 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 in 3 ways as a sum of consecutive naturals, for example, 461964 + ... + 722365.

It is an arithmetic number, because the mean of its divisors is an integer number (38550533665).

Almost surely, 2^154200820129 is an apocalyptic number.

It is an amenable number.

154200820129 is a deficient number, since it is larger than the sum of its proper divisors (1314531).

154200820129 is a wasteful number, since it uses less digits than its factorization.

154200820129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314530.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 154200820129 in words is "one hundred fifty-four billion, two hundred million, eight hundred twenty thousand, one hundred twenty-nine".