55907685 has 16 divisors (see below), whose sum is σ = 99391680. Its totient is φ = 29817360.

The previous prime is 55907669. The next prime is 55907689. The reversal of 55907685 is 58670955.

55907685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55907685 - 2⁴ = 55907669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55907685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55907689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206931 + ... + 207200.

It is an arithmetic number, because the mean of its divisors is an integer number (6211980).

Almost surely, 2^55907685 is an apocalyptic number.

It is an amenable number.

55907685 is a deficient number, since it is larger than the sum of its proper divisors (43483995).

55907685 is a wasteful number, since it uses less digits than its factorization.

55907685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414145 (or 414139 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 55907685 is about 7477.1441740814. The cubic root of 55907685 is about 382.3758920694.

The spelling of 55907685 in words is "fifty-five million, nine hundred seven thousand, six hundred eighty-five".