27786818412 has 36 divisors (see below), whose sum is σ = 70512228696. Its totient is φ = 9226229760.

The previous prime is 27786818407. The next prime is 27786818417. The reversal of 27786818412 is 21481868772.

27786818412 is a `hidden beast` number, since 2 + 77 + 86 + 81 + 8 + 412 = 666.

It is an interprime number because it is at equal distance from previous prime (27786818407) and next prime (27786818417).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×27786818412² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27786818417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1492414 + ... + 1510917.

Almost surely, 2^27786818412 is an apocalyptic number.

It is an amenable number.

27786818412 is an abundant number, since it is smaller than the sum of its proper divisors (42725410284).

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

27786818412 is a wasteful number, since it uses less digits than its factorization.

27786818412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003598 (or 3003593 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The spelling of 27786818412 in words is "twenty-seven billion, seven hundred eighty-six million, eight hundred eighteen thousand, four hundred twelve".