208755206551055 has 8 divisors (see below), whose sum is σ = 265241909500272. Its totient is φ = 157180390814848.

The previous prime is 208755206551037. The next prime is 208755206551117. The reversal of 208755206551055 is 550155602557802.

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 208755206551055 - 2²⁰ = 208755205502479 is a prime.

It is a super-2 number, since 2×208755206551055² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227971803157 + ... + 1227971803326.

It is an arithmetic number, because the mean of its divisors is an integer number (33155238687534).

Almost surely, 2^{208755206551055} is an apocalyptic number.

208755206551055 is a deficient number, since it is larger than the sum of its proper divisors (56486702949217).

208755206551055 is a wasteful number, since it uses less digits than its factorization.

208755206551055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455943606505.

The product of its (nonzero) digits is 21000000, while the sum is 56.

The spelling of 208755206551055 in words is "two hundred eight trillion, seven hundred fifty-five billion, two hundred six million, five hundred fifty-one thousand, fifty-five".