42878766636347 has 2 divisors, whose sum is σ = 42878766636348. Its totient is φ = 42878766636346.

The previous prime is 42878766636287. The next prime is 42878766636449. The reversal of 42878766636347 is 74363666787824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42878766636347 - 2²⁴ = 42878749859131 is a prime.

It is not a weakly prime, because it can be changed into another prime (42878766636247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439383318173 + 21439383318174.

It is an arithmetic number, because the mean of its divisors is an integer number (21439383318174).

Almost surely, 2^{42878766636347} is an apocalyptic number.

42878766636347 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878766636347 is an equidigital number, since it uses as much as digits as its factorization.

42878766636347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8193540096, while the sum is 77.

The spelling of 42878766636347 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred sixty-six million, six hundred thirty-six thousand, three hundred forty-seven".