27951806125 has 16 divisors (see below), whose sum is σ = 34945035840. Its totient is φ = 22322226000.

The previous prime is 27951806119. The next prime is 27951806159. The reversal of 27951806125 is 52160815972.

It is not a de Polignac number, because 27951806125 - 2³ = 27951806117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124435 + ... + 267184.

It is an arithmetic number, because the mean of its divisors is an integer number (2184064740).

Almost surely, 2^27951806125 is an apocalyptic number.

27951806125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27951806125 is a deficient number, since it is larger than the sum of its proper divisors (6993229715).

27951806125 is an equidigital number, since it uses as much as digits as its factorization.

27951806125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392205 (or 392195 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 27951806125 in words is "twenty-seven billion, nine hundred fifty-one million, eight hundred six thousand, one hundred twenty-five".