27312551909 has 8 divisors (see below), whose sum is σ = 27458818200. Its totient is φ = 27166334976.

The previous prime is 27312551899. The next prime is 27312551983. The reversal of 27312551909 is 90915521372.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6642739009 + 20669812900 = 81503^2 + 143770^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27312551909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27312551909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27312551989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1796789 + ... + 1811925.

It is an arithmetic number, because the mean of its divisors is an integer number (3432352275).

Almost surely, 2^27312551909 is an apocalyptic number.

It is an amenable number.

27312551909 is a deficient number, since it is larger than the sum of its proper divisors (146266291).

27312551909 is a wasteful number, since it uses less digits than its factorization.

27312551909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24679.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 27312551909 in words is "twenty-seven billion, three hundred twelve million, five hundred fifty-one thousand, nine hundred nine".