27780688475 has 12 divisors (see below), whose sum is σ = 35635918560. Its totient is φ = 21458186400.

The previous prime is 27780688457. The next prime is 27780688477. The reversal of 27780688475 is 57488608772.

It is a de Polignac number, because none of the positive numbers 2^k-27780688475 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27780688477) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19158371 + ... + 19159820.

It is an arithmetic number, because the mean of its divisors is an integer number (2969659880).

Almost surely, 2^27780688475 is an apocalyptic number.

27780688475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27780688475 is a deficient number, since it is larger than the sum of its proper divisors (7855230085).

27780688475 is a wasteful number, since it uses less digits than its factorization.

27780688475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38318230 (or 38318225 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 62.

The spelling of 27780688475 in words is "twenty-seven billion, seven hundred eighty million, six hundred eighty-eight thousand, four hundred seventy-five".