27801450125 has 8 divisors (see below), whose sum is σ = 34696209912. Its totient is φ = 22241160000.

The previous prime is 27801450067. The next prime is 27801450133. The reversal of 27801450125 is 52105410872.

It can be written as a sum of positive squares in 4 ways, for example, as 1277419081 + 26524031044 = 35741^2 + 162862^2 .

It is not a de Polignac number, because 27801450125 - 2¹⁰ = 27801449101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111205676 + ... + 111205925.

It is an arithmetic number, because the mean of its divisors is an integer number (4337026239).

Almost surely, 2^27801450125 is an apocalyptic number.

27801450125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27801450125 is a deficient number, since it is larger than the sum of its proper divisors (6894759787).

27801450125 is an equidigital number, since it uses as much as digits as its factorization.

27801450125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222411616 (or 222411606 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

Adding to 27801450125 its reverse (52105410872), we get a palindrome (79906860997).

The spelling of 27801450125 in words is "twenty-seven billion, eight hundred one million, four hundred fifty thousand, one hundred twenty-five".