27555305527780 has 12 divisors (see below), whose sum is σ = 57866141608380. Its totient is φ = 11022122211104.

The previous prime is 27555305527751. The next prime is 27555305527781. The reversal of 27555305527780 is 8772550355572.

It can be written as a sum of positive squares in 2 ways, for example, as 11056582620736 + 16498722907044 = 3325144^2 + 4061862^2 .

It is a super-4 number, since 4×27555305527780⁴ (a number of 55 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (27555305527781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688882638175 + ... + 688882638214.

It is an arithmetic number, because the mean of its divisors is an integer number (4822178467365).

Almost surely, 2^{27555305527780} is an apocalyptic number.

27555305527780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27555305527780 is an abundant number, since it is smaller than the sum of its proper divisors (30310836080600).

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

27555305527780 is a wasteful number, since it uses less digits than its factorization.

27555305527780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377765276398 (or 1377765276396 counting only the distinct ones).

The product of its (nonzero) digits is 102900000, while the sum is 61.

The spelling of 27555305527780 in words is "twenty-seven trillion, five hundred fifty-five billion, three hundred five million, five hundred twenty-seven thousand, seven hundred eighty".