27157021752065 has 8 divisors (see below), whose sum is σ = 32642113793280. Its totient is φ = 21689825607792.

The previous prime is 27157021752053. The next prime is 27157021752067. The reversal of 27157021752065 is 56025712075172.

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 27157021752065 - 2⁶ = 27157021752001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27157021752067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473970895 + ... + 4473976964.

It is an arithmetic number, because the mean of its divisors is an integer number (4080264224160).

Almost surely, 2^{27157021752065} is an apocalyptic number.

It is an amenable number.

27157021752065 is a deficient number, since it is larger than the sum of its proper divisors (5485092041215).

27157021752065 is an equidigital number, since it uses as much as digits as its factorization.

27157021752065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947948471.

The product of its (nonzero) digits is 2058000, while the sum is 50.

The spelling of 27157021752065 in words is "twenty-seven trillion, one hundred fifty-seven billion, twenty-one million, seven hundred fifty-two thousand, sixty-five".