85706399745 has 12 divisors (see below), whose sum is σ = 148557759636. Its totient is φ = 45710079840.

The previous prime is 85706399743. The next prime is 85706399749. The reversal of 85706399745 is 54799360758.

It can be written as a sum of positive squares in 2 ways, for example, as 39169555569 + 46536844176 = 197913^2 + 215724^2 .

It is not a de Polignac number, because 85706399745 - 2¹ = 85706399743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85706399743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 952293286 + ... + 952293375.

It is an arithmetic number, because the mean of its divisors is an integer number (12379813303).

Almost surely, 2^85706399745 is an apocalyptic number.

It is an amenable number.

85706399745 is a deficient number, since it is larger than the sum of its proper divisors (62851359891).

85706399745 is a wasteful number, since it uses less digits than its factorization.

85706399745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904586672 (or 1904586669 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 85706399745 in words is "eighty-five billion, seven hundred six million, three hundred ninety-nine thousand, seven hundred forty-five".