206424002256645 has 128 divisors (see below), whose sum is σ = 345829274081280. Its totient is φ = 105052839091200.

The previous prime is 206424002256547. The next prime is 206424002256683. The reversal of 206424002256645 is 546652200424602.

It is not a de Polignac number, because 206424002256645 - 2¹⁶ = 206424002191109 is a prime.

It is a super-2 number, since 2×206424002256645² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206424002256594 and 206424002256603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4811614695 + ... + 4811657595.

It is an arithmetic number, because the mean of its divisors is an integer number (2701791203760).

Almost surely, 2^{206424002256645} is an apocalyptic number.

It is an amenable number.

206424002256645 is a deficient number, since it is larger than the sum of its proper divisors (139405271824635).

206424002256645 is a wasteful number, since it uses less digits than its factorization.

206424002256645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43795.

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 206424002256645 in words is "two hundred six trillion, four hundred twenty-four billion, two million, two hundred fifty-six thousand, six hundred forty-five".