55649685 has 64 divisors (see below), whose sum is σ = 111605760. Its totient is φ = 23051520.

The previous prime is 55649683. The next prime is 55649723. The reversal of 55649685 is 58694655.

It is not a de Polignac number, because 55649685 - 2¹ = 55649683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55649683) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80190 + ... + 80880.

It is an arithmetic number, because the mean of its divisors is an integer number (1743840).

Almost surely, 2^55649685 is an apocalyptic number.

It is an amenable number.

55649685 is an abundant number, since it is smaller than the sum of its proper divisors (55956075).

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

55649685 is a wasteful number, since it uses less digits than its factorization.

55649685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its digits is 1296000, while the sum is 48.

The square root of 55649685 is about 7459.8716476894. The cubic root of 55649685 is about 381.7867952194.

The spelling of 55649685 in words is "fifty-five million, six hundred forty-nine thousand, six hundred eighty-five".