85454342817 has 4 divisors (see below), whose sum is σ = 113939123760. Its totient is φ = 56969561876.

The previous prime is 85454342773. The next prime is 85454342837. The reversal of 85454342817 is 71824345458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85454342817 - 2¹⁹ = 85453818529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85454342817.

It is not an unprimeable number, because it can be changed into a prime (85454342837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14242390467 + ... + 14242390472.

It is an arithmetic number, because the mean of its divisors is an integer number (28484780940).

Almost surely, 2^85454342817 is an apocalyptic number.

It is an amenable number.

85454342817 is a deficient number, since it is larger than the sum of its proper divisors (28484780943).

85454342817 is a wasteful number, since it uses less digits than its factorization.

85454342817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28484780942.

The product of its digits is 4300800, while the sum is 51.

The spelling of 85454342817 in words is "eighty-five billion, four hundred fifty-four million, three hundred forty-two thousand, eight hundred seventeen".