27777668469 has 32 divisors (see below), whose sum is σ = 40000988160. Its totient is φ = 17088508800.

The previous prime is 27777668467. The next prime is 27777668497. The reversal of 27777668469 is 96486677772.

It is a happy number.

It is not a de Polignac number, because 27777668469 - 2¹ = 27777668467 is a prime.

It is a super-2 number, since 2×27777668469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777668461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1502854 + ... + 1521224.

It is an arithmetic number, because the mean of its divisors is an integer number (1250030880).

Almost surely, 2^27777668469 is an apocalyptic number.

It is an amenable number.

27777668469 is a deficient number, since it is larger than the sum of its proper divisors (12223319691).

27777668469 is a wasteful number, since it uses less digits than its factorization.

27777668469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19081.

The product of its digits is 298722816, while the sum is 69.

The spelling of 27777668469 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred sixty-eight thousand, four hundred sixty-nine".