27019243872 has 144 divisors (see below), whose sum is σ = 82252864512. Its totient is φ = 8715807360.

The previous prime is 27019243837. The next prime is 27019243931. The reversal of 27019243872 is 27834291072.

27019243872 is a `hidden beast` number, since 27 + 0 + 192 + 438 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185013 + ... + 297099.

It is an arithmetic number, because the mean of its divisors is an integer number (571200448).

Almost surely, 2^27019243872 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 27019243872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41126432256).

27019243872 is an abundant number, since it is smaller than the sum of its proper divisors (55233620640).

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

27019243872 is a wasteful number, since it uses less digits than its factorization.

27019243872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112143 (or 112123 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 27019243872 in words is "twenty-seven billion, nineteen million, two hundred forty-three thousand, eight hundred seventy-two".