55709555 has 16 divisors (see below), whose sum is σ = 73198944. Its totient is φ = 40366080.

The previous prime is 55709513. The next prime is 55709557. The reversal of 55709555 is 55590755.

It is not a de Polignac number, because 55709555 - 2¹⁶ = 55644019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55709557) 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, 14387 + ... + 17843.

It is an arithmetic number, because the mean of its divisors is an integer number (4574934).

Almost surely, 2^55709555 is an apocalyptic number.

55709555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55709555 is a deficient number, since it is larger than the sum of its proper divisors (17489389).

55709555 is a wasteful number, since it uses less digits than its factorization.

55709555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 196875, while the sum is 41.

The square root of 55709555 is about 7463.8833726151. The cubic root of 55709555 is about 381.9236596258.

The spelling of 55709555 in words is "fifty-five million, seven hundred nine thousand, five hundred fifty-five".