27778450260 has 48 divisors (see below), whose sum is σ = 84850540992. Its totient is φ = 6734169600.

The previous prime is 27778450247. The next prime is 27778450289. The reversal of 27778450260 is 6205487772.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 21043621 + ... + 21044940.

It is an arithmetic number, because the mean of its divisors is an integer number (1767719604).

Almost surely, 2^27778450260 is an apocalyptic number.

27778450260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27778450260 is an abundant number, since it is smaller than the sum of its proper divisors (57072090732).

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

27778450260 is a wasteful number, since it uses less digits than its factorization.

27778450260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42088584 (or 42088582 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 27778450260 in words is "twenty-seven billion, seven hundred seventy-eight million, four hundred fifty thousand, two hundred sixty".