55404545 has 12 divisors (see below), whose sum is σ = 77340564. Its totient is φ = 37991520.

The previous prime is 55404541. The next prime is 55404563. The reversal of 55404545 is 54540455.

It can be written as a sum of positive squares in 2 ways, for example, as 25897921 + 29506624 = 5089^2 + 5432^2 .

It is not a de Polignac number, because 55404545 - 2² = 55404541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55404541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112826 + ... + 113315.

It is an arithmetic number, because the mean of its divisors is an integer number (6445047).

Almost surely, 2^55404545 is an apocalyptic number.

It is an amenable number.

55404545 is a deficient number, since it is larger than the sum of its proper divisors (21936019).

55404545 is a wasteful number, since it uses less digits than its factorization.

55404545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226160 (or 226153 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 32.

The square root of 55404545 is about 7443.4229357198. The cubic root of 55404545 is about 381.2253725918.

The spelling of 55404545 in words is "fifty-five million, four hundred four thousand, five hundred forty-five".