27578765625 has 28 divisors (see below), whose sum is σ = 45964099152. Its totient is φ = 14708650000.

The previous prime is 27578765623. The next prime is 27578765681. The reversal of 27578765625 is 52656787572.

It is not a de Polignac number, because 27578765625 - 2¹ = 27578765623 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27578765623) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 247299 + ... + 341048.

Almost surely, 2^27578765625 is an apocalyptic number.

27578765625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27578765625 is a deficient number, since it is larger than the sum of its proper divisors (18385333527).

27578765625 is an frugal number, since it uses more digits than its factorization.

27578765625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588380 (or 588355 counting only the distinct ones).

The product of its digits is 49392000, while the sum is 60.

The spelling of 27578765625 in words is "twenty-seven billion, five hundred seventy-eight million, seven hundred sixty-five thousand, six hundred twenty-five".