27350003405 has 4 divisors (see below), whose sum is σ = 32820004092. Its totient is φ = 21880002720.

The previous prime is 27350003399. The next prime is 27350003411. The reversal of 27350003405 is 50430005372.

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

It is an interprime number because it is at equal distance from previous prime (27350003399) and next prime (27350003411).

It can be written as a sum of positive squares in 2 ways, for example, as 5575459561 + 21774543844 = 74669^2 + 147562^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27350003405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2735000336 + ... + 2735000345.

It is an arithmetic number, because the mean of its divisors is an integer number (8205001023).

Almost surely, 2^27350003405 is an apocalyptic number.

It is an amenable number.

27350003405 is a deficient number, since it is larger than the sum of its proper divisors (5470000687).

27350003405 is an equidigital number, since it uses as much as digits as its factorization.

27350003405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470000686.

The product of its (nonzero) digits is 12600, while the sum is 29.

Adding to 27350003405 its reverse (50430005372), we get a palindrome (77780008777).

The spelling of 27350003405 in words is "twenty-seven billion, three hundred fifty million, three thousand, four hundred five".