55605906 has 32 divisors (see below), whose sum is σ = 124416000. Its totient is φ = 18408240.

The previous prime is 55605899. The next prime is 55605911. The reversal of 55605906 is 60950655.

55605906 is a `hidden beast` number, since 5 + 5 + 60 + 590 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4591 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (3888000).

Almost surely, 2^55605906 is an apocalyptic number.

55605906 is an abundant number, since it is smaller than the sum of its proper divisors (68810094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55605906 is a wasteful number, since it uses less digits than its factorization.

55605906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071 (or 7065 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 55605906 is about 7456.9367705513. The cubic root of 55605906 is about 381.6866531192.

The spelling of 55605906 in words is "fifty-five million, six hundred five thousand, nine hundred six".