27781074287 has 8 divisors (see below), whose sum is σ = 28037329200. Its totient is φ = 27525750400.

The previous prime is 27781074271. The next prime is 27781074313. The reversal of 27781074287 is 78247018772.

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 27781074287 - 2⁴ = 27781074271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27781074187) 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, 172733 + ... + 292230.

It is an arithmetic number, because the mean of its divisors is an integer number (3504666150).

Almost surely, 2^27781074287 is an apocalyptic number.

27781074287 is a deficient number, since it is larger than the sum of its proper divisors (256254913).

27781074287 is a wasteful number, since it uses less digits than its factorization.

27781074287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465513.

The product of its (nonzero) digits is 2458624, while the sum is 53.

The spelling of 27781074287 in words is "twenty-seven billion, seven hundred eighty-one million, seventy-four thousand, two hundred eighty-seven".