27652863720 has 128 divisors (see below), whose sum is σ = 87517584000. Its totient is φ = 6970567680.

The previous prime is 27652863677. The next prime is 27652863727. The reversal of 27652863720 is 2736825672.

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 27652863720.

It is not an unprimeable number, because it can be changed into a prime (27652863727) 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, 1037926 + ... + 1064234.

It is an arithmetic number, because the mean of its divisors is an integer number (683731125).

Almost surely, 2^27652863720 is an apocalyptic number.

27652863720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27652863720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43758792000).

27652863720 is an abundant number, since it is smaller than the sum of its proper divisors (59864720280).

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

27652863720 is a wasteful number, since it uses less digits than its factorization.

27652863720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26803 (or 26799 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 27652863720 in words is "twenty-seven billion, six hundred fifty-two million, eight hundred sixty-three thousand, seven hundred twenty".