505523143035401 has 4 divisors (see below), whose sum is σ = 517852975792404. Its totient is φ = 493193310278400.

The previous prime is 505523143035377. The next prime is 505523143035403. The reversal of 505523143035401 is 104530341325505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 233940818175376 + 271582324860025 = 15295124^2 + 16479755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505523143035401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 12329832756961 = 505523143035401 / (5 + 0 + 5 + 5 + 2 + 3 + 1 + 4 + 3 + 0 + 3 + 5 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505523143035403) 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, 6164916378440 + ... + 6164916378521.

It is an arithmetic number, because the mean of its divisors is an integer number (129463243948101).

Almost surely, 2^{505523143035401} is an apocalyptic number.

It is an amenable number.

505523143035401 is a deficient number, since it is larger than the sum of its proper divisors (12329832757003).

505523143035401 is a wasteful number, since it uses less digits than its factorization.

505523143035401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12329832757002.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 505523143035401 in words is "five hundred five trillion, five hundred twenty-three billion, one hundred forty-three million, thirty-five thousand, four hundred one".