42138280613501 has 2 divisors, whose sum is σ = 42138280613502. Its totient is φ = 42138280613500.

The previous prime is 42138280613497. The next prime is 42138280613503. The reversal of 42138280613501 is 10531608283124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34394694360601 + 7743586252900 = 5864699^2 + 2782730^2 .

It is a cyclic number.

It is not a de Polignac number, because 42138280613501 - 2² = 42138280613497 is a prime.

Together with 42138280613503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42138280613503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21069140306750 + 21069140306751.

It is an arithmetic number, because the mean of its divisors is an integer number (21069140306751).

Almost surely, 2^{42138280613501} is an apocalyptic number.

It is an amenable number.

42138280613501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42138280613501 is an equidigital number, since it uses as much as digits as its factorization.

42138280613501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 44.

Adding to 42138280613501 its reverse (10531608283124), we get a palindrome (52669888896625).

The spelling of 42138280613501 in words is "forty-two trillion, one hundred thirty-eight billion, two hundred eighty million, six hundred thirteen thousand, five hundred one".