27019567861225 has 9 divisors (see below), whose sum is σ = 33504296375767. Its totient is φ = 21615633496840.

The previous prime is 27019567861211. The next prime is 27019567861241. The reversal of 27019567861225 is 52216876591072.

It is a happy number.

The square root of 27019567861225 is 5198035.

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., 9727044430041 + 17292523431184 = 3118821^2 + 4158428^2 .

It is not a de Polignac number, because 27019567861225 - 2¹¹ = 27019567859177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25470372 + ... + 26509978.

Almost surely, 2^{27019567861225} is an apocalyptic number.

27019567861225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27019567861225 is the 5198035-th square number.

27019567861225 is the 2599018-th centered octagonal number.

It is an amenable number.

27019567861225 is a deficient number, since it is larger than the sum of its proper divisors (6484728514542).

27019567861225 is an frugal number, since it uses more digits than its factorization.

27019567861225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079224 (or 1039612 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 61.

The spelling of 27019567861225 in words is "twenty-seven trillion, nineteen billion, five hundred sixty-seven million, eight hundred sixty-one thousand, two hundred twenty-five".