27965056971 has 4 divisors (see below), whose sum is σ = 37286742632. Its totient is φ = 18643371312.

The previous prime is 27965056949. The next prime is 27965056993. The reversal of 27965056971 is 17965056972.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27965056949) and next prime (27965056993).

It is not a de Polignac number, because 27965056971 - 2¹³ = 27965048779 is a prime.

It is a super-2 number, since 2×27965056971² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27965056271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4660842826 + ... + 4660842831.

It is an arithmetic number, because the mean of its divisors is an integer number (9321685658).

Almost surely, 2^27965056971 is an apocalyptic number.

27965056971 is a deficient number, since it is larger than the sum of its proper divisors (9321685661).

27965056971 is an equidigital number, since it uses as much as digits as its factorization.

27965056971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321685660.

The product of its (nonzero) digits is 7144200, while the sum is 57.

Subtracting from 27965056971 its reverse (17965056972), we obtain a palindrome (9999999999).

The spelling of 27965056971 in words is "twenty-seven billion, nine hundred sixty-five million, fifty-six thousand, nine hundred seventy-one".