27777645080 has 64 divisors (see below), whose sum is σ = 65837772000. Its totient is φ = 10518488064.

The previous prime is 27777645079. The next prime is 27777645101. The reversal of 27777645080 is 8054677772.

It is a congruent number.

It is an unprimeable number.

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, 1073252 + ... + 1098828.

Almost surely, 2^27777645080 is an apocalyptic number.

27777645080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27777645080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32918886000).

27777645080 is an abundant number, since it is smaller than the sum of its proper divisors (38060126920).

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

27777645080 is a wasteful number, since it uses less digits than its factorization.

27777645080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27036 (or 27032 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 53.

The spelling of 27777645080 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred forty-five thousand, eighty".