85474942547 has 2 divisors, whose sum is σ = 85474942548. Its totient is φ = 85474942546.

The previous prime is 85474942513. The next prime is 85474942639. The reversal of 85474942547 is 74524947458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85474942547 - 2⁸ = 85474942291 is a prime.

It is not a weakly prime, because it can be changed into another prime (85474942247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42737471273 + 42737471274.

It is an arithmetic number, because the mean of its divisors is an integer number (42737471274).

Almost surely, 2^85474942547 is an apocalyptic number.

85474942547 is a deficient number, since it is larger than the sum of its proper divisors (1).

85474942547 is an equidigital number, since it uses as much as digits as its factorization.

85474942547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45158400, while the sum is 59.

The spelling of 85474942547 in words is "eighty-five billion, four hundred seventy-four million, nine hundred forty-two thousand, five hundred forty-seven".