27786131824 has 80 divisors (see below), whose sum is σ = 61560059904. Its totient is φ = 12026361600.

The previous prime is 27786131783. The next prime is 27786131827. The reversal of 27786131824 is 42813168772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27786131827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887314 + ... + 918094.

Almost surely, 2^27786131824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27786131824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30780029952).

27786131824 is an abundant number, since it is smaller than the sum of its proper divisors (33773928080).

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

27786131824 is a wasteful number, since it uses less digits than its factorization.

27786131824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31046 (or 31040 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The spelling of 27786131824 in words is "twenty-seven billion, seven hundred eighty-six million, one hundred thirty-one thousand, eight hundred twenty-four".