85420307744 has 24 divisors (see below), whose sum is σ = 169299906300. Its totient is φ = 42423506176.

The previous prime is 85420307741. The next prime is 85420307761. The reversal of 85420307744 is 44770302458.

It can be written as a sum of positive squares in 2 ways, for example, as 85299043600 + 121264144 = 292060^2 + 11012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85420307695 and 85420307704.

It is not an unprimeable number, because it can be changed into a prime (85420307741) 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, 8952899 + ... + 8962434.

Almost surely, 2^85420307744 is an apocalyptic number.

It is an amenable number.

85420307744 is a deficient number, since it is larger than the sum of its proper divisors (83879598556).

85420307744 is a wasteful number, since it uses less digits than its factorization.

85420307744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17915492 (or 17915484 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 44.

The spelling of 85420307744 in words is "eighty-five billion, four hundred twenty million, three hundred seven thousand, seven hundred forty-four".