27556069428 has 60 divisors (see below), whose sum is σ = 72124607940. Its totient is φ = 9174187008.

The previous prime is 27556069399. The next prime is 27556069433. The reversal of 27556069428 is 82496065572.

27556069428 is a `hidden beast` number, since 2 + 7 + 5 + 5 + 606 + 9 + 4 + 28 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19565854884 + 7990214544 = 139878^2 + 89388^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 217300 + ... + 319892.

It is an arithmetic number, because the mean of its divisors is an integer number (1202076799).

Almost surely, 2^27556069428 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 27556069428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36062303970).

27556069428 is an abundant number, since it is smaller than the sum of its proper divisors (44568538512).

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

27556069428 is a wasteful number, since it uses less digits than its factorization.

27556069428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103438 (or 103427 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 27556069428 in words is "twenty-seven billion, five hundred fifty-six million, sixty-nine thousand, four hundred twenty-eight".