206640246426016 has 96 divisors (see below), whose sum is σ = 440965939559040. Its totient is φ = 94754242077696.

The previous prime is 206640246425993. The next prime is 206640246426059. The reversal of 206640246426016 is 610624642046602.

It is a super-2 number, since 2×206640246426016² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37401565 + ... + 42569443.

It is an arithmetic number, because the mean of its divisors is an integer number (4593395203740).

Almost surely, 2^{206640246426016} is an apocalyptic number.

206640246426016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206640246426016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220482969779520).

206640246426016 is an abundant number, since it is smaller than the sum of its proper divisors (234325693133024).

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

206640246426016 is a wasteful number, since it uses less digits than its factorization.

206640246426016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168526 (or 5168518 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 206640246426016 in words is "two hundred six trillion, six hundred forty billion, two hundred forty-six million, four hundred twenty-six thousand, sixteen".