85438057168 has 20 divisors (see below), whose sum is σ = 168249946468. Its totient is φ = 42018716160.

The previous prime is 85438057147. The next prime is 85438057171. The reversal of 85438057168 is 86175083458.

It can be written as a sum of positive squares in 2 ways, for example, as 13481067664 + 71956989504 = 116108^2 + 268248^2 .

It is a super-2 number, since 2×85438057168² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 43768521 + ... + 43770472.

Almost surely, 2^85438057168 is an apocalyptic number.

It is an amenable number.

85438057168 is a deficient number, since it is larger than the sum of its proper divisors (82811889300).

85438057168 is a wasteful number, since it uses less digits than its factorization.

85438057168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87539062 (or 87539056 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 85438057168 in words is "eighty-five billion, four hundred thirty-eight million, fifty-seven thousand, one hundred sixty-eight".