55770559 has 4 divisors (see below), whose sum is σ = 60060616. Its totient is φ = 51480504.

The previous prime is 55770497. The next prime is 55770563. The reversal of 55770559 is 95507755.

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

It is a cyclic number.

It is not a de Polignac number, because 55770559 - 2²¹ = 53673407 is a prime.

It is a super-2 number, since 2×55770559² = 6220710502344962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55770569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145009 + ... + 2145034.

It is an arithmetic number, because the mean of its divisors is an integer number (15015154).

Almost surely, 2^55770559 is an apocalyptic number.

55770559 is a deficient number, since it is larger than the sum of its proper divisors (4290057).

55770559 is a wasteful number, since it uses less digits than its factorization.

55770559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290056.

The product of its (nonzero) digits is 275625, while the sum is 43.

The square root of 55770559 is about 7467.9688671017. The cubic root of 55770559 is about 382.0630155630.

The spelling of 55770559 in words is "fifty-five million, seven hundred seventy thousand, five hundred fifty-nine".