626013142421 has 2 divisors, whose sum is σ = 626013142422. Its totient is φ = 626013142420.

The previous prime is 626013142409. The next prime is 626013142459. The reversal of 626013142421 is 124241310626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620707622500 + 5305519921 = 787850^2 + 72839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626013142421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626013142621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313006571210 + 313006571211.

It is an arithmetic number, because the mean of its divisors is an integer number (313006571211).

Almost surely, 2^626013142421 is an apocalyptic number.

It is an amenable number.

626013142421 is a deficient number, since it is larger than the sum of its proper divisors (1).

626013142421 is an equidigital number, since it uses as much as digits as its factorization.

626013142421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 626013142421 in words is "six hundred twenty-six billion, thirteen million, one hundred forty-two thousand, four hundred twenty-one".