27805080500 has 24 divisors (see below), whose sum is σ = 60726296904. Its totient is φ = 11122032000.

The previous prime is 27805080487. The next prime is 27805080503. The reversal of 27805080500 is 508050872.

It can be written as a sum of positive squares in 4 ways, for example, as 721137316 + 27083943184 = 26854^2 + 164572^2 .

It is a super-2 number, since 2×27805080500² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27805080503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27804581 + ... + 27805580.

It is an arithmetic number, because the mean of its divisors is an integer number (2530262371).

Almost surely, 2^27805080500 is an apocalyptic number.

27805080500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27805080500 is an abundant number, since it is smaller than the sum of its proper divisors (32921216404).

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

27805080500 is a wasteful number, since it uses less digits than its factorization.

27805080500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55610180 (or 55610168 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The spelling of 27805080500 in words is "twenty-seven billion, eight hundred five million, eighty thousand, five hundred".