155530044342401 has 4 divisors (see below), whose sum is σ = 156215198722992. Its totient is φ = 154844889961812.

The previous prime is 155530044342391. The next prime is 155530044342457. The reversal of 155530044342401 is 104243440035551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155530044342401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155530044342901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342577189955 + ... + 342577190408.

It is an arithmetic number, because the mean of its divisors is an integer number (39053799680748).

Almost surely, 2^{155530044342401} is an apocalyptic number.

It is an amenable number.

155530044342401 is a deficient number, since it is larger than the sum of its proper divisors (685154380591).

155530044342401 is an equidigital number, since it uses as much as digits as its factorization.

155530044342401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685154380590.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 155530044342401 its reverse (104243440035551), we get a palindrome (259773484377952).

The spelling of 155530044342401 in words is "one hundred fifty-five trillion, five hundred thirty billion, forty-four million, three hundred forty-two thousand, four hundred one".