42378478547 has 2 divisors, whose sum is σ = 42378478548. Its totient is φ = 42378478546.

The previous prime is 42378478487. The next prime is 42378478567. The reversal of 42378478547 is 74587487324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42378478547 - 2⁸ = 42378478291 is a prime.

It is not a weakly prime, because it can be changed into another prime (42378478567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21189239273 + 21189239274.

It is an arithmetic number, because the mean of its divisors is an integer number (21189239274).

Almost surely, 2^42378478547 is an apocalyptic number.

42378478547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42378478547 is an equidigital number, since it uses as much as digits as its factorization.

42378478547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42147840, while the sum is 59.

The spelling of 42378478547 in words is "forty-two billion, three hundred seventy-eight million, four hundred seventy-eight thousand, five hundred forty-seven".