155424311322401 has 6 divisors (see below), whose sum is σ = 170838292610706. Its totient is φ = 141294828474800.

The previous prime is 155424311322391. The next prime is 155424311322431. The reversal of 155424311322401 is 104223113424551.

It can be written as a sum of positive squares in only one way, i.e., 97158950741776 + 58265360580625 = 9856924^2 + 7633175^2 .

It is a de Polignac number, because none of the positive numbers 2^k-155424311322401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155424311322431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642249220220 + ... + 642249220461.

It is an arithmetic number, because the mean of its divisors is an integer number (28473048768451).

Almost surely, 2^{155424311322401} is an apocalyptic number.

155424311322401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155424311322401 is a deficient number, since it is larger than the sum of its proper divisors (15413981288305).

155424311322401 is a wasteful number, since it uses less digits than its factorization.

155424311322401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284498440703 (or 1284498440692 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 155424311322401 its reverse (104223113424551), we get a palindrome (259647424746952).

The spelling of 155424311322401 in words is "one hundred fifty-five trillion, four hundred twenty-four billion, three hundred eleven million, three hundred twenty-two thousand, four hundred one".