42829426621 has 2 divisors, whose sum is σ = 42829426622. Its totient is φ = 42829426620.

The previous prime is 42829426613. The next prime is 42829426681. The reversal of 42829426621 is 12662492824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42174783225 + 654643396 = 205365^2 + 25586^2 .

It is a cyclic number.

It is not a de Polignac number, because 42829426621 - 2³ = 42829426613 is a prime.

It is a super-3 number, since 3×42829426621³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42829426681) 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, 21414713310 + 21414713311.

It is an arithmetic number, because the mean of its divisors is an integer number (21414713311).

Almost surely, 2^42829426621 is an apocalyptic number.

It is an amenable number.

42829426621 is a deficient number, since it is larger than the sum of its proper divisors (1).

42829426621 is an equidigital number, since it uses as much as digits as its factorization.

42829426621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 46.

The spelling of 42829426621 in words is "forty-two billion, eight hundred twenty-nine million, four hundred twenty-six thousand, six hundred twenty-one".