27661027479 has 32 divisors (see below), whose sum is σ = 38342025216. Its totient is φ = 17719215360.

The previous prime is 27661027463. The next prime is 27661027553. The reversal of 27661027479 is 97472016672.

It is not a de Polignac number, because 27661027479 - 2⁴ = 27661027463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27668027479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11302834 + ... + 11305280.

It is an arithmetic number, because the mean of its divisors is an integer number (1198188288).

Almost surely, 2^27661027479 is an apocalyptic number.

27661027479 is a deficient number, since it is larger than the sum of its proper divisors (10680997737).

27661027479 is a wasteful number, since it uses less digits than its factorization.

27661027479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295.

The product of its (nonzero) digits is 1778112, while the sum is 51.

The spelling of 27661027479 in words is "twenty-seven billion, six hundred sixty-one million, twenty-seven thousand, four hundred seventy-nine".