55691798 has 4 divisors (see below), whose sum is σ = 83537700. Its totient is φ = 27845898.

The previous prime is 55691789. The next prime is 55691821. The reversal of 55691798 is 89719655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13922948 + ... + 13922951.

It is an arithmetic number, because the mean of its divisors is an integer number (20884425).

Almost surely, 2^55691798 is an apocalyptic number.

55691798 is a deficient number, since it is larger than the sum of its proper divisors (27845902).

55691798 is a wasteful number, since it uses less digits than its factorization.

55691798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27845901.

The product of its digits is 680400, while the sum is 50.

The square root of 55691798 is about 7462.6937495786. The cubic root of 55691798 is about 381.8830768862.

The spelling of 55691798 in words is "fifty-five million, six hundred ninety-one thousand, seven hundred ninety-eight".