42645454613 has 2 divisors, whose sum is σ = 42645454614. Its totient is φ = 42645454612.

The previous prime is 42645454591. The next prime is 42645454639. The reversal of 42645454613 is 31645454624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42643489009 + 1965604 = 206503^2 + 1402^2 .

It is a cyclic number.

It is not a de Polignac number, because 42645454613 - 2¹⁰ = 42645453589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42645454673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21322727306 + 21322727307.

It is an arithmetic number, because the mean of its divisors is an integer number (21322727307).

Almost surely, 2^42645454613 is an apocalyptic number.

It is an amenable number.

42645454613 is a deficient number, since it is larger than the sum of its proper divisors (1).

42645454613 is an equidigital number, since it uses as much as digits as its factorization.

42645454613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 44.

The spelling of 42645454613 in words is "forty-two billion, six hundred forty-five million, four hundred fifty-four thousand, six hundred thirteen".