27861121504 has 48 divisors (see below), whose sum is σ = 57814177680. Its totient is φ = 13180078080.

The previous prime is 27861121489. The next prime is 27861121531. The reversal of 27861121504 is 40512116872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440344 + ... + 499624.

It is an arithmetic number, because the mean of its divisors is an integer number (1204462035).

Almost surely, 2^27861121504 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 27861121504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28907088840).

27861121504 is an abundant number, since it is smaller than the sum of its proper divisors (29953056176).

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

27861121504 is a wasteful number, since it uses less digits than its factorization.

27861121504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60083 (or 60075 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 27861121504 in words is "twenty-seven billion, eight hundred sixty-one million, one hundred twenty-one thousand, five hundred four".