27455484820 has 24 divisors (see below), whose sum is σ = 57660266664. Its totient is φ = 10981479936.

The previous prime is 27455484781. The next prime is 27455484827. The reversal of 27455484820 is 2848455472.

It can be written as a sum of positive squares in 4 ways, for example, as 59938564 + 27395546256 = 7742^2 + 165516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27455484827) 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, 360312 + ... + 429808.

It is an arithmetic number, because the mean of its divisors is an integer number (2402511111).

Almost surely, 2^27455484820 is an apocalyptic number.

27455484820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27455484820 is an abundant number, since it is smaller than the sum of its proper divisors (30204781844).

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

27455484820 is a wasteful number, since it uses less digits than its factorization.

27455484820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89259 (or 89257 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 49.

The spelling of 27455484820 in words is "twenty-seven billion, four hundred fifty-five million, four hundred eighty-four thousand, eight hundred twenty".