27780032505 has 8 divisors (see below), whose sum is σ = 44448052032. Its totient is φ = 14816017328.

The previous prime is 27780032443. The next prime is 27780032513. The reversal of 27780032505 is 50523008772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27780032505 - 2⁷ = 27780032377 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 926001069 + ... + 926001098.

It is an arithmetic number, because the mean of its divisors is an integer number (5556006504).

Almost surely, 2^27780032505 is an apocalyptic number.

It is an amenable number.

27780032505 is a deficient number, since it is larger than the sum of its proper divisors (16668019527).

27780032505 is a wasteful number, since it uses less digits than its factorization.

27780032505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852002175.

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 27780032505 in words is "twenty-seven billion, seven hundred eighty million, thirty-two thousand, five hundred five".