42878307727513 has 2 divisors, whose sum is σ = 42878307727514. Its totient is φ = 42878307727512.

The previous prime is 42878307727501. The next prime is 42878307727523. The reversal of 42878307727513 is 31572770387824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29098116467289 + 13780191260224 = 5394267^2 + 3712168^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878307727513 - 2⁹ = 42878307727001 is a prime.

It is not a weakly prime, because it can be changed into another prime (42878307727523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439153863756 + 21439153863757.

It is an arithmetic number, because the mean of its divisors is an integer number (21439153863757).

Almost surely, 2^{42878307727513} is an apocalyptic number.

It is an amenable number.

42878307727513 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878307727513 is an equidigital number, since it uses as much as digits as its factorization.

42878307727513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110638080, while the sum is 64.

The spelling of 42878307727513 in words is "forty-two trillion, eight hundred seventy-eight billion, three hundred seven million, seven hundred twenty-seven thousand, five hundred thirteen".