27787781369080 has 32 divisors (see below), whose sum is σ = 62527716332640. Its totient is φ = 11114186636160.

The previous prime is 27787781368961. The next prime is 27787781369087. The reversal of 27787781369080 is 8096318778772.

It is a junction number, because it is equal to n+sod(n) for n = 27787781368994 and 27787781369012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27787781369087) 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, 28448451 + ... + 29409010.

It is an arithmetic number, because the mean of its divisors is an integer number (1953991135395).

Almost surely, 2^{27787781369080} is an apocalyptic number.

27787781369080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27787781369080 is an abundant number, since it is smaller than the sum of its proper divisors (34739934963560).

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

27787781369080 is a wasteful number, since it uses less digits than its factorization.

27787781369080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57869479 (or 57869475 counting only the distinct ones).

The product of its (nonzero) digits is 398297088, while the sum is 73.

The spelling of 27787781369080 in words is "twenty-seven trillion, seven hundred eighty-seven billion, seven hundred eighty-one million, three hundred sixty-nine thousand, eighty".