42826708657 has 2 divisors, whose sum is σ = 42826708658. Its totient is φ = 42826708656.

The previous prime is 42826708621. The next prime is 42826708679. The reversal of 42826708657 is 75680762824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37202308641 + 5624400016 = 192879^2 + 74996^2 .

It is a cyclic number.

It is not a de Polignac number, because 42826708657 - 2¹⁹ = 42826184369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42826708598 and 42826708607.

It is not a weakly prime, because it can be changed into another prime (42826708697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21413354328 + 21413354329.

It is an arithmetic number, because the mean of its divisors is an integer number (21413354329).

Almost surely, 2^42826708657 is an apocalyptic number.

It is an amenable number.

42826708657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42826708657 is an equidigital number, since it uses as much as digits as its factorization.

42826708657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 42826708657 in words is "forty-two billion, eight hundred twenty-six million, seven hundred eight thousand, six hundred fifty-seven".