42847178635207 has 2 divisors, whose sum is σ = 42847178635208. Its totient is φ = 42847178635206.

The previous prime is 42847178635193. The next prime is 42847178635249. The reversal of 42847178635207 is 70253687174824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42847178635207 - 2³⁹ = 42297422821319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42847178635277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423589317603 + 21423589317604.

It is an arithmetic number, because the mean of its divisors is an integer number (21423589317604).

Almost surely, 2^{42847178635207} is an apocalyptic number.

42847178635207 is a deficient number, since it is larger than the sum of its proper divisors (1).

42847178635207 is an equidigital number, since it uses as much as digits as its factorization.

42847178635207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 42847178635207 in words is "forty-two trillion, eight hundred forty-seven billion, one hundred seventy-eight million, six hundred thirty-five thousand, two hundred seven".