27655601 has 4 divisors (see below), whose sum is σ = 28124400. Its totient is φ = 27186804.

The previous prime is 27655577. The next prime is 27655619. The reversal of 27655601 is 10655672.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27655601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27651601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234311 + ... + 234428.

It is an arithmetic number, because the mean of its divisors is an integer number (7031100).

Almost surely, 2^27655601 is an apocalyptic number.

It is an amenable number.

27655601 is a deficient number, since it is larger than the sum of its proper divisors (468799).

27655601 is an equidigital number, since it uses as much as digits as its factorization.

27655601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468798.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 27655601 is about 5258.8592869557. The cubic root of 27655601 is about 302.4087596786.

The spelling of 27655601 in words is "twenty-seven million, six hundred fifty-five thousand, six hundred one".