55440757 has 4 divisors (see below), whose sum is σ = 58701996. Its totient is φ = 52179520.

The previous prime is 55440739. The next prime is 55440761. The reversal of 55440757 is 75704455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47900241 + 7540516 = 6921^2 + 2746^2 .

It is a cyclic number.

It is not a de Polignac number, because 55440757 - 2²³ = 47052149 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 (55440767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630594 + ... + 1630627.

It is an arithmetic number, because the mean of its divisors is an integer number (14675499).

Almost surely, 2^55440757 is an apocalyptic number.

It is an amenable number.

55440757 is a deficient number, since it is larger than the sum of its proper divisors (3261239).

55440757 is a wasteful number, since it uses less digits than its factorization.

55440757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261238.

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 55440757 is about 7445.8550214196. The cubic root of 55440757 is about 381.3084098629.

The spelling of 55440757 in words is "fifty-five million, four hundred forty thousand, seven hundred fifty-seven".