27451121500 has 96 divisors (see below), whose sum is σ = 65583790272. Its totient is φ = 9954720000.

The previous prime is 27451121471. The next prime is 27451121521. The reversal of 27451121500 is 512115472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2044810 + ... + 2058190.

It is an arithmetic number, because the mean of its divisors is an integer number (683164482).

Almost surely, 2^27451121500 is an apocalyptic number.

27451121500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27451121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32791895136).

27451121500 is an abundant number, since it is smaller than the sum of its proper divisors (38132668772).

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

27451121500 is a wasteful number, since it uses less digits than its factorization.

27451121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13784 (or 13772 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 27451121500 its reverse (512115472), we get a palindrome (27963236972).

The spelling of 27451121500 in words is "twenty-seven billion, four hundred fifty-one million, one hundred twenty-one thousand, five hundred".