260221856651 has 2 divisors, whose sum is σ = 260221856652. Its totient is φ = 260221856650.

The previous prime is 260221856617. The next prime is 260221856723. The reversal of 260221856651 is 156658122062.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260221856651 - 2²² = 260217662347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (260221855651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130110928325 + 130110928326.

It is an arithmetic number, because the mean of its divisors is an integer number (130110928326).

Almost surely, 2^260221856651 is an apocalyptic number.

260221856651 is a deficient number, since it is larger than the sum of its proper divisors (1).

260221856651 is an equidigital number, since it uses as much as digits as its factorization.

260221856651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 260221856651 in words is "two hundred sixty billion, two hundred twenty-one million, eight hundred fifty-six thousand, six hundred fifty-one".