2426856697621 has 2 divisors, whose sum is σ = 2426856697622. Its totient is φ = 2426856697620.

The previous prime is 2426856697579. The next prime is 2426856697673. The reversal of 2426856697621 is 1267966586242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107534510225 + 319322187396 = 1451735^2 + 565086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2426856697621 - 2²⁷ = 2426722479893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2426856698621) by changing a digit.

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 as a sum of consecutive naturals, namely, 1213428348810 + 1213428348811.

It is an arithmetic number, because the mean of its divisors is an integer number (1213428348811).

Almost surely, 2^{2426856697621} is an apocalyptic number.

It is an amenable number.

2426856697621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2426856697621 is an equidigital number, since it uses as much as digits as its factorization.

2426856697621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104509440, while the sum is 64.

The spelling of 2426856697621 in words is "two trillion, four hundred twenty-six billion, eight hundred fifty-six million, six hundred ninety-seven thousand, six hundred twenty-one".