42826708621 has 2 divisors, whose sum is σ = 42826708622. Its totient is φ = 42826708620.

The previous prime is 42826708571. The next prime is 42826708657. The reversal of 42826708621 is 12680762824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32461228900 + 10365479721 = 180170^2 + 101811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42826708621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42826708321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21413354310 + 21413354311.

It is an arithmetic number, because the mean of its divisors is an integer number (21413354311).

Almost surely, 2^42826708621 is an apocalyptic number.

It is an amenable number.

42826708621 is a deficient number, since it is larger than the sum of its proper divisors (1).

42826708621 is an equidigital number, since it uses as much as digits as its factorization.

42826708621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 42826708621 in words is "forty-two billion, eight hundred twenty-six million, seven hundred eight thousand, six hundred twenty-one".