27768508151 has 4 divisors (see below), whose sum is σ = 29230008600. Its totient is φ = 26307007704.

The previous prime is 27768508129. The next prime is 27768508153. The reversal of 27768508151 is 15180586772.

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 27768508151 - 2¹⁸ = 27768246007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27768508151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768508153) 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, 730750196 + ... + 730750233.

It is an arithmetic number, because the mean of its divisors is an integer number (7307502150).

Almost surely, 2^27768508151 is an apocalyptic number.

27768508151 is a deficient number, since it is larger than the sum of its proper divisors (1461500449).

27768508151 is a wasteful number, since it uses less digits than its factorization.

27768508151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461500448.

The product of its (nonzero) digits is 940800, while the sum is 50.

The spelling of 27768508151 in words is "twenty-seven billion, seven hundred sixty-eight million, five hundred eight thousand, one hundred fifty-one".