55208390687 has 8 divisors (see below), whose sum is σ = 58130146800. Its totient is φ = 52288239744.

The previous prime is 55208390669. The next prime is 55208390689. The reversal of 55208390687 is 78609380255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55208390687 - 2⁸ = 55208390431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55208390689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330362 + ... + 468567.

It is an arithmetic number, because the mean of its divisors is an integer number (7266268350).

Almost surely, 2^55208390687 is an apocalyptic number.

55208390687 is a deficient number, since it is larger than the sum of its proper divisors (2921756113).

55208390687 is a wasteful number, since it uses less digits than its factorization.

55208390687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802585.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 55208390687 in words is "fifty-five billion, two hundred eight million, three hundred ninety thousand, six hundred eighty-seven".