55401605 has 12 divisors (see below), whose sum is σ = 77336460. Its totient is φ = 37989504.

The previous prime is 55401601. The next prime is 55401667. The reversal of 55401605 is 50610455.

55401605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 36747844 = 4319^2 + 6062^2 .

It is not a de Polignac number, because 55401605 - 2² = 55401601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55401601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112820 + ... + 113309.

It is an arithmetic number, because the mean of its divisors is an integer number (6444705).

Almost surely, 2^55401605 is an apocalyptic number.

It is an amenable number.

55401605 is a deficient number, since it is larger than the sum of its proper divisors (21934855).

55401605 is a wasteful number, since it uses less digits than its factorization.

55401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226148 (or 226141 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55401605 is about 7443.2254433142. The cubic root of 55401605 is about 381.2186293278.

The spelling of 55401605 in words is "fifty-five million, four hundred one thousand, six hundred five".