27800543378 has 8 divisors (see below), whose sum is σ = 41824557372. Its totient is φ = 13859024256.

The previous prime is 27800543363. The next prime is 27800543399. The reversal of 27800543378 is 87334500872.

It can be written as a sum of positive squares in 2 ways, for example, as 27686630449 + 113912929 = 166393^2 + 10673^2 .

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

It is a super-2 number, since 2×27800543378² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20622875 + ... + 20624222.

Almost surely, 2^27800543378 is an apocalyptic number.

27800543378 is a deficient number, since it is larger than the sum of its proper divisors (14024013994).

27800543378 is a wasteful number, since it uses less digits than its factorization.

27800543378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41247436.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 27800543378 in words is "twenty-seven billion, eight hundred million, five hundred forty-three thousand, three hundred seventy-eight".