85438507712 has 28 divisors (see below), whose sum is σ = 170582194776. Its totient is φ = 42457167360.

The previous prime is 85438507699. The next prime is 85438507729. The reversal of 85438507712 is 21770583458.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084589 + ... + 4105452.

It is an arithmetic number, because the mean of its divisors is an integer number (6092221242).

Almost surely, 2^85438507712 is an apocalyptic number.

It is an amenable number.

85438507712 is a deficient number, since it is larger than the sum of its proper divisors (85143687064).

85438507712 is a wasteful number, since it uses less digits than its factorization.

85438507712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190216 (or 8190206 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 85438507712 in words is "eighty-five billion, four hundred thirty-eight million, five hundred seven thousand, seven hundred twelve".