154655523032321 has 2 divisors, whose sum is σ = 154655523032322. Its totient is φ = 154655523032320.

The previous prime is 154655523032201. The next prime is 154655523032323. The reversal of 154655523032321 is 123230325556451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144589466015296 + 10066057017025 = 12024536^2 + 3172705^2 .

It is an emirp because it is prime and its reverse (123230325556451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154655523032321 is a prime.

Together with 154655523032323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (154655523032323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77327761516160 + 77327761516161.

It is an arithmetic number, because the mean of its divisors is an integer number (77327761516161).

Almost surely, 2^{154655523032321} is an apocalyptic number.

It is an amenable number.

154655523032321 is a deficient number, since it is larger than the sum of its proper divisors (1).

154655523032321 is an equidigital number, since it uses as much as digits as its factorization.

154655523032321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240000, while the sum is 47.

Adding to 154655523032321 its reverse (123230325556451), we get a palindrome (277885848588772).

The spelling of 154655523032321 in words is "one hundred fifty-four trillion, six hundred fifty-five billion, five hundred twenty-three million, thirty-two thousand, three hundred twenty-one".