55709645 has 4 divisors (see below), whose sum is σ = 66851580. Its totient is φ = 44567712.

The previous prime is 55709603. The next prime is 55709677. The reversal of 55709645 is 54690755.

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 8773444 + 46936201 = 2962^2 + 6851^2 .

It is a cyclic number.

It is not a de Polignac number, because 55709645 - 2⁶ = 55709581 is a prime.

It is a super-3 number, since 3×55709645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5570960 + ... + 5570969.

It is an arithmetic number, because the mean of its divisors is an integer number (16712895).

Almost surely, 2^55709645 is an apocalyptic number.

It is an amenable number.

55709645 is a deficient number, since it is larger than the sum of its proper divisors (11141935).

55709645 is a wasteful number, since it uses less digits than its factorization.

55709645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141934.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 55709645 is about 7463.8894016458. The cubic root of 55709645 is about 381.9238652944.

The spelling of 55709645 in words is "fifty-five million, seven hundred nine thousand, six hundred forty-five".