27772389469 has 4 divisors (see below), whose sum is σ = 30297152160. Its totient is φ = 25247626780.

The previous prime is 27772389467. The next prime is 27772389481. The reversal of 27772389469 is 96498327772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27772389469 - 2¹ = 27772389467 is a prime.

It is a super-2 number, since 2×27772389469² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27772389469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27772389467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262381329 + ... + 1262381350.

It is an arithmetic number, because the mean of its divisors is an integer number (7574288040).

Almost surely, 2^27772389469 is an apocalyptic number.

It is an amenable number.

27772389469 is a deficient number, since it is larger than the sum of its proper divisors (2524762691).

27772389469 is a wasteful number, since it uses less digits than its factorization.

27772389469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524762690.

The product of its digits is 64012032, while the sum is 64.

It can be divided in two parts, 27772 and 389469, that added together give a triangular number (417241 = T₉₁₃).

The spelling of 27772389469 in words is "twenty-seven billion, seven hundred seventy-two million, three hundred eighty-nine thousand, four hundred sixty-nine".