27775578220 has 48 divisors (see below), whose sum is σ = 62843770080. Its totient is φ = 10250989056.

The previous prime is 27775578191. The next prime is 27775578221. The reversal of 27775578220 is 2287557772.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (27775578221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585304 + ... + 630976.

It is an arithmetic number, because the mean of its divisors is an integer number (1309245210).

Almost surely, 2^27775578220 is an apocalyptic number.

27775578220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27775578220 is an abundant number, since it is smaller than the sum of its proper divisors (35068191860).

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

27775578220 is a wasteful number, since it uses less digits than its factorization.

27775578220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48034 (or 48032 counting only the distinct ones).

The product of its (nonzero) digits is 3841600, while the sum is 52.

The spelling of 27775578220 in words is "twenty-seven billion, seven hundred seventy-five million, five hundred seventy-eight thousand, two hundred twenty".