27771582380 has 24 divisors (see below), whose sum is σ = 58323661200. Its totient is φ = 11107997120.

The previous prime is 27771582373. The next prime is 27771582401. The reversal of 27771582380 is 8328517772.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491846 + ... + 545394.

It is an arithmetic number, because the mean of its divisors is an integer number (2430152550).

Almost surely, 2^27771582380 is an apocalyptic number.

27771582380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27771582380 is an abundant number, since it is smaller than the sum of its proper divisors (30552078820).

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

27771582380 is a wasteful number, since it uses less digits than its factorization.

27771582380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79489 (or 79487 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 27771582380 in words is "twenty-seven billion, seven hundred seventy-one million, five hundred eighty-two thousand, three hundred eighty".