15546349225 has 27 divisors (see below), whose sum is σ = 21198639511. Its totient is φ = 11301448400.

The previous prime is 15546349219. The next prime is 15546349243. The reversal of 15546349225 is 52294364551.

The square root of 15546349225 is 124685.

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

It can be written as a sum of positive squares in only one way, i.e., 5596685721 + 9949663504 = 74811^2 + 99748^2 .

It is not a de Polignac number, because 15546349225 - 2²⁵ = 15512794793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6856542 + ... + 6858808.

Almost surely, 2^15546349225 is an apocalyptic number.

15546349225 is the 124685-th square number.

15546349225 is the 62343-rd centered octagonal number.

It is an amenable number.

15546349225 is a deficient number, since it is larger than the sum of its proper divisors (5652290286).

15546349225 is an frugal number, since it uses more digits than its factorization.

15546349225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566 (or 2283 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The spelling of 15546349225 in words is "fifteen billion, five hundred forty-six million, three hundred forty-nine thousand, two hundred twenty-five".