27520243128 has 80 divisors (see below), whose sum is σ = 88093914480. Its totient is φ = 7862925312.

The previous prime is 27520243123. The next prime is 27520243133. The reversal of 27520243128 is 82134202572.

27520243128 is a `hidden beast` number, since 2 + 7 + 520 + 2 + 4 + 3 + 128 = 666.

It is an interprime number because it is at equal distance from previous prime (27520243123) and next prime (27520243133).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27520243092 and 27520243101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27520243123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3029001 + ... + 3038072.

It is an arithmetic number, because the mean of its divisors is an integer number (1101173931).

Almost surely, 2^27520243128 is an apocalyptic number.

27520243128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27520243128 is an abundant number, since it is smaller than the sum of its proper divisors (60573671352).

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

27520243128 is a wasteful number, since it uses less digits than its factorization.

27520243128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067098 (or 6067085 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 27520243128 in words is "twenty-seven billion, five hundred twenty million, two hundred forty-three thousand, one hundred twenty-eight".