27780855575 has 24 divisors (see below), whose sum is σ = 39790511280. Its totient is φ = 19015769600.

The previous prime is 27780855569. The next prime is 27780855607. The reversal of 27780855575 is 57555808772.

It is a happy number.

It is not a de Polignac number, because 27780855575 - 2⁴ = 27780855559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2966540 + ... + 2975889.

It is an arithmetic number, because the mean of its divisors is an integer number (1657937970).

Almost surely, 2^27780855575 is an apocalyptic number.

27780855575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27780855575 is a deficient number, since it is larger than the sum of its proper divisors (12009655705).

27780855575 is a wasteful number, since it uses less digits than its factorization.

27780855575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942467 (or 5942462 counting only the distinct ones).

The product of its (nonzero) digits is 27440000, while the sum is 59.

The spelling of 27780855575 in words is "twenty-seven billion, seven hundred eighty million, eight hundred fifty-five thousand, five hundred seventy-five".