85478461547 has 2 divisors, whose sum is σ = 85478461548. Its totient is φ = 85478461546.

The previous prime is 85478461531. The next prime is 85478461559. The reversal of 85478461547 is 74516487458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85478461547 - 2⁴ = 85478461531 is a prime.

It is not a weakly prime, because it can be changed into another prime (85478461507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42739230773 + 42739230774.

It is an arithmetic number, because the mean of its divisors is an integer number (42739230774).

Almost surely, 2^85478461547 is an apocalyptic number.

85478461547 is a deficient number, since it is larger than the sum of its proper divisors (1).

85478461547 is an equidigital number, since it uses as much as digits as its factorization.

85478461547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30105600, while the sum is 59.

The spelling of 85478461547 in words is "eighty-five billion, four hundred seventy-eight million, four hundred sixty-one thousand, five hundred forty-seven".