55646261 has 16 divisors (see below), whose sum is σ = 63694080. Its totient is φ = 48156480.

The previous prime is 55646251. The next prime is 55646309. The reversal of 55646261 is 16264655.

It is a cyclic number.

It is not a de Polignac number, because 55646261 - 2⁶ = 55646197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55646251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17675 + ... + 20583.

It is an arithmetic number, because the mean of its divisors is an integer number (3980880).

Almost surely, 2^55646261 is an apocalyptic number.

It is an amenable number.

55646261 is a deficient number, since it is larger than the sum of its proper divisors (8047819).

55646261 is a wasteful number, since it uses less digits than its factorization.

55646261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its digits is 43200, while the sum is 35.

The square root of 55646261 is about 7459.6421495940. The cubic root of 55646261 is about 381.7789648978.

The spelling of 55646261 in words is "fifty-five million, six hundred forty-six thousand, two hundred sixty-one".