27789132540 has 48 divisors (see below), whose sum is σ = 83794925088. Its totient is φ = 6840401664.

The previous prime is 27789132517. The next prime is 27789132583. The reversal of 27789132540 is 4523198772.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27789132540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17812767 + ... + 17814326.

It is an arithmetic number, because the mean of its divisors is an integer number (1745727606).

Almost surely, 2^27789132540 is an apocalyptic number.

27789132540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27789132540 is an abundant number, since it is smaller than the sum of its proper divisors (56005792548).

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

27789132540 is a wasteful number, since it uses less digits than its factorization.

27789132540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35627118 (or 35627116 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 27789132540 in words is "twenty-seven billion, seven hundred eighty-nine million, one hundred thirty-two thousand, five hundred forty".