27781870260 has 48 divisors (see below), whose sum is σ = 78950281536. Its totient is φ = 7297923072.

The previous prime is 27781870247. The next prime is 27781870279. The reversal of 27781870260 is 6207818772.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3451437 + ... + 3459476.

It is an arithmetic number, because the mean of its divisors is an integer number (1644797532).

Almost surely, 2^27781870260 is an apocalyptic number.

27781870260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27781870260 is an abundant number, since it is smaller than the sum of its proper divisors (51168411276).

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

27781870260 is a wasteful number, since it uses less digits than its factorization.

27781870260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910992 (or 6910990 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 27781870260 in words is "twenty-seven billion, seven hundred eighty-one million, eight hundred seventy thousand, two hundred sixty".