27780444969 has 32 divisors (see below), whose sum is σ = 38659286016. Its totient is φ = 17727906240.

The previous prime is 27780444917. The next prime is 27780444973. The reversal of 27780444969 is 96944408772.

It is not a de Polignac number, because 27780444969 - 2²⁴ = 27763667753 is a prime.

It is a super-3 number, since 3×27780444969³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (27780440969) 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 31 ways as a sum of consecutive naturals, for example, 7219404 + ... + 7223250.

It is an arithmetic number, because the mean of its divisors is an integer number (1208102688).

Almost surely, 2^27780444969 is an apocalyptic number.

It is an amenable number.

27780444969 is a deficient number, since it is larger than the sum of its proper divisors (10878841047).

27780444969 is a wasteful number, since it uses less digits than its factorization.

27780444969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925.

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 27780444969 in words is "twenty-seven billion, seven hundred eighty million, four hundred forty-four thousand, nine hundred sixty-nine".