42738850117 has 2 divisors, whose sum is σ = 42738850118. Its totient is φ = 42738850116.

The previous prime is 42738850103. The next prime is 42738850123. The reversal of 42738850117 is 71105883724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27758558881 + 14980291236 = 166609^2 + 122394^2 .

It is a cyclic number.

It is not a de Polignac number, because 42738850117 - 2¹⁹ = 42738325829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42738850157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21369425058 + 21369425059.

It is an arithmetic number, because the mean of its divisors is an integer number (21369425059).

Almost surely, 2^42738850117 is an apocalyptic number.

It is an amenable number.

42738850117 is a deficient number, since it is larger than the sum of its proper divisors (1).

42738850117 is an equidigital number, since it uses as much as digits as its factorization.

42738850117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 42738850117 in words is "forty-two billion, seven hundred thirty-eight million, eight hundred fifty thousand, one hundred seventeen".