55605601 has 4 divisors (see below), whose sum is σ = 56275632. Its totient is φ = 54935572.

The previous prime is 55605593. The next prime is 55605607. The reversal of 55605601 is 10650655.

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 not a de Polignac number, because 55605601 - 2³ = 55605593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55605601.

It is not an unprimeable number, because it can be changed into a prime (55605607) 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, 334891 + ... + 335056.

It is an arithmetic number, because the mean of its divisors is an integer number (14068908).

Almost surely, 2^55605601 is an apocalyptic number.

It is an amenable number.

55605601 is a deficient number, since it is larger than the sum of its proper divisors (670031).

55605601 is an equidigital number, since it uses as much as digits as its factorization.

55605601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670030.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55605601 is about 7456.9163197665. The cubic root of 55605601 is about 381.6859552638.

The spelling of 55605601 in words is "fifty-five million, six hundred five thousand, six hundred one".