27771280416 has 72 divisors (see below), whose sum is σ = 86154095664. Its totient is φ = 8415538560.

The previous prime is 27771280409. The next prime is 27771280421. The reversal of 27771280416 is 61408217772.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4379926 + ... + 4386261.

It is an arithmetic number, because the mean of its divisors is an integer number (1196584662).

Almost surely, 2^27771280416 is an apocalyptic number.

It is an amenable number.

27771280416 is an abundant number, since it is smaller than the sum of its proper divisors (58382815248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27771280416 is a wasteful number, since it uses less digits than its factorization.

27771280416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766214 (or 8766203 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 27771280416 in words is "twenty-seven billion, seven hundred seventy-one million, two hundred eighty thousand, four hundred sixteen".