55691908 has 6 divisors (see below), whose sum is σ = 97460846. Its totient is φ = 27845952.

The previous prime is 55691897. The next prime is 55691917. The reversal of 55691908 is 80919655.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45400644 + 10291264 = 6738^2 + 3208^2 .

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 as a sum of consecutive naturals, namely, 6961485 + ... + 6961492.

Almost surely, 2^55691908 is an apocalyptic number.

It is an amenable number.

55691908 is a deficient number, since it is larger than the sum of its proper divisors (41768938).

55691908 is a wasteful number, since it uses less digits than its factorization.

55691908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13922981 (or 13922979 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 55691908 is about 7462.7011195679. The cubic root of 55691908 is about 381.8833283123.

The spelling of 55691908 in words is "fifty-five million, six hundred ninety-one thousand, nine hundred eight".