27065968978 has 8 divisors (see below), whose sum is σ = 40971421260. Its totient is φ = 13408828560.

The previous prime is 27065968973. The next prime is 27065969009. The reversal of 27065968978 is 87986956072.

It can be written as a sum of positive squares in 2 ways, for example, as 26904856729 + 161112249 = 164027^2 + 12693^2 .

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

It is not an unprimeable number, because it can be changed into a prime (27065968973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62077693 + ... + 62078128.

Almost surely, 2^27065968978 is an apocalyptic number.

27065968978 is a deficient number, since it is larger than the sum of its proper divisors (13905452282).

27065968978 is a wasteful number, since it uses less digits than its factorization.

27065968978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124155932.

The product of its (nonzero) digits is 91445760, while the sum is 67.

The spelling of 27065968978 in words is "twenty-seven billion, sixty-five million, nine hundred sixty-eight thousand, nine hundred seventy-eight".