27138128480 has 48 divisors (see below), whose sum is σ = 65323543824. Its totient is φ = 10650432000.

The previous prime is 27138128443. The next prime is 27138128509. The reversal of 27138128480 is 8482183172.

It is a super-2 number, since 2×27138128480² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1591646 + ... + 1608605.

It is an arithmetic number, because the mean of its divisors is an integer number (1360907163).

Almost surely, 2^27138128480 is an apocalyptic number.

27138128480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27138128480 is an abundant number, since it is smaller than the sum of its proper divisors (38185415344).

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

27138128480 is a wasteful number, since it uses less digits than its factorization.

27138128480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200319 (or 3200311 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 27138128480 in words is "twenty-seven billion, one hundred thirty-eight million, one hundred twenty-eight thousand, four hundred eighty".