27401836225 has 9 divisors (see below), whose sum is σ = 33979303267. Its totient is φ = 21920806840.

The previous prime is 27401836219. The next prime is 27401836261. The reversal of 27401836225 is 52263810472.

The square root of 27401836225 is 165535.

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., 9864661041 + 17537175184 = 99321^2 + 132428^2 .

It is not a de Polignac number, because 27401836225 - 2⁷ = 27401836097 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, 811122 + ... + 844228.

Almost surely, 2^27401836225 is an apocalyptic number.

27401836225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27401836225 is the 165535-th square number.

27401836225 is the 82768-th centered octagonal number.

It is an amenable number.

27401836225 is a deficient number, since it is larger than the sum of its proper divisors (6577467042).

27401836225 is an frugal number, since it uses more digits than its factorization.

27401836225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66224 (or 33112 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 27401836225 in words is "twenty-seven billion, four hundred one million, eight hundred thirty-six thousand, two hundred twenty-five".