206051025226661 has 32 divisors (see below), whose sum is σ = 210986937907200. Its totient is φ = 201166351176960.

The previous prime is 206051025226649. The next prime is 206051025226663. The reversal of 206051025226661 is 166622520150602.

It is a cyclic number.

It is not a de Polignac number, because 206051025226661 - 2⁴² = 201652978715557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206051025226663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43079869076 + ... + 43079873858.

It is an arithmetic number, because the mean of its divisors is an integer number (6593341809600).

Almost surely, 2^{206051025226661} is an apocalyptic number.

It is an amenable number.

206051025226661 is a deficient number, since it is larger than the sum of its proper divisors (4935912680539).

206051025226661 is a wasteful number, since it uses less digits than its factorization.

206051025226661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 206051025226661 in words is "two hundred six trillion, fifty-one billion, twenty-five million, two hundred twenty-six thousand, six hundred sixty-one".