27197355905 has 16 divisors (see below), whose sum is σ = 36059105664. Its totient is φ = 19587659520.

The previous prime is 27197355893. The next prime is 27197355917. The reversal of 27197355905 is 50955379172.

It is an interprime number because it is at equal distance from previous prime (27197355893) and next prime (27197355917).

It is not a de Polignac number, because 27197355905 - 2¹⁰ = 27197354881 is a prime.

It is a super-3 number, since 3×27197355905³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian 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, 6953891 + ... + 6957800.

It is an arithmetic number, because the mean of its divisors is an integer number (2253694104).

Almost surely, 2^27197355905 is an apocalyptic number.

It is an amenable number.

27197355905 is a deficient number, since it is larger than the sum of its proper divisors (8861749759).

27197355905 is a wasteful number, since it uses less digits than its factorization.

27197355905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13911736.

The product of its (nonzero) digits is 2976750, while the sum is 53.

The spelling of 27197355905 in words is "twenty-seven billion, one hundred ninety-seven million, three hundred fifty-five thousand, nine hundred five".