27123450505 has 8 divisors (see below), whose sum is σ = 32549356224. Its totient is φ = 21697950000.

The previous prime is 27123450463. The next prime is 27123450521. The reversal of 27123450505 is 50505432172.

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

It is not a de Polignac number, because 27123450505 - 2²⁵ = 27089896073 is a prime.

It is a Duffinian 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, 73330 + ... + 244180.

It is an arithmetic number, because the mean of its divisors is an integer number (4068669528).

Almost surely, 2^27123450505 is an apocalyptic number.

It is an amenable number.

27123450505 is a deficient number, since it is larger than the sum of its proper divisors (5425905719).

27123450505 is a wasteful number, since it uses less digits than its factorization.

27123450505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202607.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 27123450505 its reverse (50505432172), we get a palindrome (77628882677).

The spelling of 27123450505 in words is "twenty-seven billion, one hundred twenty-three million, four hundred fifty thousand, five hundred five".