42426611639 has 2 divisors, whose sum is σ = 42426611640. Its totient is φ = 42426611638.

The previous prime is 42426611627. The next prime is 42426611657. The reversal of 42426611639 is 93611662424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42426611639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42426611639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42426611609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21213305819 + 21213305820.

It is an arithmetic number, because the mean of its divisors is an integer number (21213305820).

Almost surely, 2^42426611639 is an apocalyptic number.

42426611639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42426611639 is an equidigital number, since it uses as much as digits as its factorization.

42426611639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The spelling of 42426611639 in words is "forty-two billion, four hundred twenty-six million, six hundred eleven thousand, six hundred thirty-nine".