27800747656 has 32 divisors (see below), whose sum is σ = 58252128480. Its totient is φ = 12328489600.

The previous prime is 27800747647. The next prime is 27800747699. The reversal of 27800747656 is 65674700872.

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, 3849046 + ... + 3856261.

It is an arithmetic number, because the mean of its divisors is an integer number (1820379015).

Almost surely, 2^27800747656 is an apocalyptic number.

It is an amenable number.

27800747656 is an abundant number, since it is smaller than the sum of its proper divisors (30451380824).

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

27800747656 is a wasteful number, since it uses less digits than its factorization.

27800747656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7705365 (or 7705361 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 27800747656 in words is "twenty-seven billion, eight hundred million, seven hundred forty-seven thousand, six hundred fifty-six".