55641906 has 12 divisors (see below), whose sum is σ = 120557502. Its totient is φ = 18547296.

The previous prime is 55641893. The next prime is 55641913. The reversal of 55641906 is 60914655.

55641906 is a `hidden beast` number, since 5 + 5 + 641 + 9 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 4447881 = 7155^2 + 2109^2 .

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 1545591 + ... + 1545626.

Almost surely, 2^55641906 is an apocalyptic number.

55641906 is an abundant number, since it is smaller than the sum of its proper divisors (64915596).

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

55641906 is a wasteful number, since it uses less digits than its factorization.

55641906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091225 (or 3091222 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55641906 is about 7459.3502397997. The cubic root of 55641906 is about 381.7690050147.

The spelling of 55641906 in words is "fifty-five million, six hundred forty-one thousand, nine hundred six".