27195072805 has 8 divisors (see below), whose sum is σ = 34553739672. Its totient is φ = 20476290048.

The previous prime is 27195072769. The next prime is 27195072823. The reversal of 27195072805 is 50827059172.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6900791041 + 20294281764 = 83071^2 + 142458^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 27195072805 - 2²⁷ = 27060855077 is a prime.

It is a Duffinian number.

It is a congruent 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, 159970932 + ... + 159971101.

It is an arithmetic number, because the mean of its divisors is an integer number (4319217459).

Almost surely, 2^27195072805 is an apocalyptic number.

It is an amenable number.

27195072805 is a deficient number, since it is larger than the sum of its proper divisors (7358666867).

27195072805 is a wasteful number, since it uses less digits than its factorization.

27195072805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319942055.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 27195072805 in words is "twenty-seven billion, one hundred ninety-five million, seventy-two thousand, eight hundred five".