55601646 has 8 divisors (see below), whose sum is σ = 111203304. Its totient is φ = 18533880.

The previous prime is 55601599. The next prime is 55601647. The reversal of 55601646 is 64610655.

It is a sphenic number, since it is the product of 3 distinct primes.

55601646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55601647) 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, 4633465 + ... + 4633476.

It is an arithmetic number, because the mean of its divisors is an integer number (13900413).

Almost surely, 2^55601646 is an apocalyptic number.

55601646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55601646 is a wasteful number, since it uses less digits than its factorization.

55601646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9266946.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55601646 is about 7456.6511250024. The cubic root of 55601646 is about 381.6769057933.

Subtracting 55601646 from its reverse (64610655), we obtain a palindrome (9009009).

The spelling of 55601646 in words is "fifty-five million, six hundred one thousand, six hundred forty-six".