626002100261 has 2 divisors, whose sum is σ = 626002100262. Its totient is φ = 626002100260.

The previous prime is 626002100239. The next prime is 626002100263. The reversal of 626002100261 is 162001200626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616460522500 + 9541577761 = 785150^2 + 97681^2 .

It is a cyclic number.

It is not a de Polignac number, because 626002100261 - 2³⁰ = 624928358437 is a prime.

Together with 626002100263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 626002100261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626002100263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313001050130 + 313001050131.

It is an arithmetic number, because the mean of its divisors is an integer number (313001050131).

Almost surely, 2^626002100261 is an apocalyptic number.

It is an amenable number.

626002100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

626002100261 is an equidigital number, since it uses as much as digits as its factorization.

626002100261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 626002100261 its reverse (162001200626), we get a palindrome (788003300887).

The spelling of 626002100261 in words is "six hundred twenty-six billion, two million, one hundred thousand, two hundred sixty-one".