206426706422440 has 64 divisors (see below), whose sum is σ = 553890293026560. Its totient is φ = 67697702476800.

The previous prime is 206426706422429. The next prime is 206426706422459. The reversal of 206426706422440 is 44224607624602.

It is a super-2 number, since 2×206426706422440² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16026911761 + ... + 16026924640.

It is an arithmetic number, because the mean of its divisors is an integer number (8654535828540).

Almost surely, 2^{206426706422440} is an apocalyptic number.

206426706422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206426706422440 is an abundant number, since it is smaller than the sum of its proper divisors (347463586604120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206426706422440 is a wasteful number, since it uses less digits than its factorization.

206426706422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32053836442 (or 32053836438 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 49.

The spelling of 206426706422440 in words is "two hundred six trillion, four hundred twenty-six billion, seven hundred six million, four hundred twenty-two thousand, four hundred forty".