27551388133 has 4 divisors (see below), whose sum is σ = 27669634668. Its totient is φ = 27433141600.

The previous prime is 27551388131. The next prime is 27551388149. The reversal of 27551388133 is 33188315572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19298210724 + 8253177409 = 138918^2 + 90847^2 .

It is a cyclic number.

It is not a de Polignac number, because 27551388133 - 2¹ = 27551388131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27551388131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 59122918 + ... + 59123383.

It is an arithmetic number, because the mean of its divisors is an integer number (6917408667).

Almost surely, 2^27551388133 is an apocalyptic number.

It is an amenable number.

27551388133 is a deficient number, since it is larger than the sum of its proper divisors (118246535).

27551388133 is a wasteful number, since it uses less digits than its factorization.

27551388133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118246534.

The product of its digits is 604800, while the sum is 46.

The spelling of 27551388133 in words is "twenty-seven billion, five hundred fifty-one million, three hundred eighty-eight thousand, one hundred thirty-three".