27977615075 has 6 divisors (see below), whose sum is σ = 34692242724. Its totient is φ = 22382092040.

The previous prime is 27977615059. The next prime is 27977615189. The reversal of 27977615075 is 57051677972.

It is a happy number.

It is not a de Polignac number, because 27977615075 - 2⁴ = 27977615059 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 27977615075.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 559552277 + ... + 559552326.

It is an arithmetic number, because the mean of its divisors is an integer number (5782040454).

Almost surely, 2^27977615075 is an apocalyptic number.

27977615075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27977615075 is a deficient number, since it is larger than the sum of its proper divisors (6714627649).

27977615075 is a wasteful number, since it uses less digits than its factorization.

27977615075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119104613 (or 1119104608 counting only the distinct ones).

The product of its (nonzero) digits is 6482700, while the sum is 56.

The spelling of 27977615075 in words is "twenty-seven billion, nine hundred seventy-seven million, six hundred fifteen thousand, seventy-five".