55707865 has 4 divisors (see below), whose sum is σ = 66849444. Its totient is φ = 44566288.

The previous prime is 55707809. The next prime is 55707893. The reversal of 55707865 is 56870755.

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 17106496 + 38601369 = 4136^2 + 6213^2 .

It is a cyclic number.

It is not a de Polignac number, because 55707865 - 2¹¹ = 55705817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5570782 + ... + 5570791.

It is an arithmetic number, because the mean of its divisors is an integer number (16712361).

Almost surely, 2^55707865 is an apocalyptic number.

It is an amenable number.

55707865 is a deficient number, since it is larger than the sum of its proper divisors (11141579).

55707865 is a wasteful number, since it uses less digits than its factorization.

55707865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11141578.

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 55707865 is about 7463.7701599125. The cubic root of 55707865 is about 381.9197975863.

The spelling of 55707865 in words is "fifty-five million, seven hundred seven thousand, eight hundred sixty-five".