55440011 has 16 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 49404000.

The previous prime is 55439981. The next prime is 55440013. The reversal of 55440011 is 11004455.

It is a cyclic number.

It is not a de Polignac number, because 55440011 - 2²² = 51245707 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55440013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154250 + ... + 154608.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^55440011 is an apocalyptic number.

55440011 is a deficient number, since it is larger than the sum of its proper divisors (6249589).

55440011 is a wasteful number, since it uses less digits than its factorization.

55440011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 55440011 is about 7445.8049262655. The cubic root of 55440011 is about 381.3066995848.

Adding to 55440011 its reverse (11004455), we get a palindrome (66444466).

Subtracting from 55440011 its reverse (11004455), we obtain a square (44435556 = 6666²).

The spelling of 55440011 in words is "fifty-five million, four hundred forty thousand, eleven".