154144400321 has 4 divisors (see below), whose sum is σ = 159459724500. Its totient is φ = 148829076144.

The previous prime is 154144400299. The next prime is 154144400329. The reversal of 154144400321 is 123004441451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123004441451 = 2099 ⋅58601449.

It can be written as a sum of positive squares in 2 ways, for example, as 60300204721 + 93844195600 = 245561^2 + 306340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154144400321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 5315324149 = 154144400321 / (1 + 5 + 4 + 1 + 4 + 4 + 4 + 0 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154144400329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2657662046 + ... + 2657662103.

It is an arithmetic number, because the mean of its divisors is an integer number (39864931125).

Almost surely, 2^154144400321 is an apocalyptic number.

It is an amenable number.

154144400321 is a deficient number, since it is larger than the sum of its proper divisors (5315324179).

154144400321 is an equidigital number, since it uses as much as digits as its factorization.

154144400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315324178.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 154144400321 its reverse (123004441451), we get a palindrome (277148841772).

The spelling of 154144400321 in words is "one hundred fifty-four billion, one hundred forty-four million, four hundred thousand, three hundred twenty-one".