85511744 has 14 divisors (see below), whose sum is σ = 169687494. Its totient is φ = 42755840.

The previous prime is 85511743. The next prime is 85511747. The reversal of 85511744 is 44711558.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 13601344 = 8480^2 + 3688^2 .

It is not an unprimeable number, because it can be changed into a prime (85511743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667997 + ... + 668124.

Almost surely, 2^85511744 is an apocalyptic number.

It is an amenable number.

85511744 is a deficient number, since it is larger than the sum of its proper divisors (84175750).

85511744 is a wasteful number, since it uses less digits than its factorization.

85511744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336133 (or 1336123 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 85511744 is about 9247.2560254380. The cubic root of 85511744 is about 440.5635753552.

The spelling of 85511744 in words is "eighty-five million, five hundred eleven thousand, seven hundred forty-four".