15555327841 has 3 divisors (see below), whose sum is σ = 15555452563. Its totient is φ = 15555203120.

The previous prime is 15555327833. The next prime is 15555327857. The reversal of 15555327841 is 14872355551.

The square root of 15555327841 is 124721.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14872355551 = 2017 ⋅7373503.

It can be written as a sum of positive squares in only one way, i.e., 109809441 + 15445518400 = 10479^2 + 124280^2 .

It is not a de Polignac number, because 15555327841 - 2³ = 15555327833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15555327791 and 15555327800.

It is not an unprimeable number, because it can be changed into a prime (15555327871) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62361 + ... + 187081.

Almost surely, 2^15555327841 is an apocalyptic number.

15555327841 is the 124721-st square number.

15555327841 is the 62361-st centered octagonal number.

It is an amenable number.

15555327841 is a deficient number, since it is larger than the sum of its proper divisors (124722).

15555327841 is an frugal number, since it uses more digits than its factorization.

15555327841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249442 (or 124721 counting only the distinct ones).

The product of its digits is 840000, while the sum is 46.

It can be divided in two parts, 15555 and 327841, that added together give a square (343396 = 586²).

The spelling of 15555327841 in words is "fifteen billion, five hundred fifty-five million, three hundred twenty-seven thousand, eight hundred forty-one".