55621617065206 has 4 divisors (see below), whose sum is σ = 83432425597812. Its totient is φ = 27810808532602.

The previous prime is 55621617065173. The next prime is 55621617065219. The reversal of 55621617065206 is 60256071612655.

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, 13905404266300 + ... + 13905404266303.

It is an arithmetic number, because the mean of its divisors is an integer number (20858106399453).

Almost surely, 2^{55621617065206} is an apocalyptic number.

55621617065206 is a deficient number, since it is larger than the sum of its proper divisors (27810808532606).

55621617065206 is a wasteful number, since it uses less digits than its factorization.

55621617065206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27810808532605.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 55621617065206 in words is "fifty-five trillion, six hundred twenty-one billion, six hundred seventeen million, sixty-five thousand, two hundred six".