27725142565 has 8 divisors (see below), whose sum is σ = 33321124728. Its totient is φ = 22146144960.

The previous prime is 27725142493. The next prime is 27725142611. The reversal of 27725142565 is 56524152772.

It can be written as a sum of positive squares in 4 ways, for example, as 8030668996 + 19694473569 = 89614^2 + 140337^2 .

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

It is not a de Polignac number, because 27725142565 - 2¹¹ = 27725140517 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, 4242546 + ... + 4249075.

It is an arithmetic number, because the mean of its divisors is an integer number (4165140591).

Almost surely, 2^27725142565 is an apocalyptic number.

It is an amenable number.

27725142565 is a deficient number, since it is larger than the sum of its proper divisors (5595982163).

27725142565 is an equidigital number, since it uses as much as digits as its factorization.

27725142565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492279.

The product of its digits is 1176000, while the sum is 46.

The spelling of 27725142565 in words is "twenty-seven billion, seven hundred twenty-five million, one hundred forty-two thousand, five hundred sixty-five".