34025665621 has 2 divisors, whose sum is σ = 34025665622. Its totient is φ = 34025665620.

The previous prime is 34025665589. The next prime is 34025665649. The reversal of 34025665621 is 12656652043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22353240100 + 11672425521 = 149510^2 + 108039^2 .

It is a cyclic number.

It is not a de Polignac number, because 34025665621 - 2⁵ = 34025665589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34025665321) 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, 17012832810 + 17012832811.

It is an arithmetic number, because the mean of its divisors is an integer number (17012832811).

Almost surely, 2^34025665621 is an apocalyptic number.

It is an amenable number.

34025665621 is a deficient number, since it is larger than the sum of its proper divisors (1).

34025665621 is an equidigital number, since it uses as much as digits as its factorization.

34025665621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 34025665621 in words is "thirty-four billion, twenty-five million, six hundred sixty-five thousand, six hundred twenty-one".