27745107220 has 12 divisors (see below), whose sum is σ = 58264725204. Its totient is φ = 11098042880.

The previous prime is 27745107209. The next prime is 27745107241. The reversal of 27745107220 is 2270154772.

It can be written as a sum of positive squares in 2 ways, for example, as 18679782276 + 9065324944 = 136674^2 + 95212^2 .

It is a super-2 number, since 2×27745107220² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27745107220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693627661 + ... + 693627700.

It is an arithmetic number, because the mean of its divisors is an integer number (4855393767).

Almost surely, 2^27745107220 is an apocalyptic number.

27745107220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27745107220 is an abundant number, since it is smaller than the sum of its proper divisors (30519617984).

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

27745107220 is a wasteful number, since it uses less digits than its factorization.

27745107220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387255370 (or 1387255368 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 37.

The spelling of 27745107220 in words is "twenty-seven billion, seven hundred forty-five million, one hundred seven thousand, two hundred twenty".