206620243455 has 8 divisors (see below), whose sum is σ = 330592389552. Its totient is φ = 110197463168.

The previous prime is 206620243451. The next prime is 206620243493. The reversal of 206620243455 is 554342026602.

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 206620243455 - 2² = 206620243451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206620243451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6887341434 + ... + 6887341463.

It is an arithmetic number, because the mean of its divisors is an integer number (41324048694).

Almost surely, 2^206620243455 is an apocalyptic number.

206620243455 is a deficient number, since it is larger than the sum of its proper divisors (123972146097).

206620243455 is a wasteful number, since it uses less digits than its factorization.

206620243455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13774682905.

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 206620243455 in words is "two hundred six billion, six hundred twenty million, two hundred forty-three thousand, four hundred fifty-five".