27800734351 has 4 divisors (see below), whose sum is σ = 29939252392. Its totient is φ = 25662216312.

The previous prime is 27800734343. The next prime is 27800734361. The reversal of 27800734351 is 15343700872.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27800734351 - 2³ = 27800734343 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 (27800734361) 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, 1069259001 + ... + 1069259026.

It is an arithmetic number, because the mean of its divisors is an integer number (7484813098).

Almost surely, 2^27800734351 is an apocalyptic number.

27800734351 is a deficient number, since it is larger than the sum of its proper divisors (2138518041).

27800734351 is a wasteful number, since it uses less digits than its factorization.

27800734351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138518040.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 27800734351 in words is "twenty-seven billion, eight hundred million, seven hundred thirty-four thousand, three hundred fifty-one".