85641436 has 12 divisors (see below), whose sum is σ = 157760680. Its totient is φ = 40566960.

The previous prime is 85641419. The next prime is 85641467. The reversal of 85641436 is 63414658.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 85641395 and 85641404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563355 + ... + 563506.

Almost surely, 2^85641436 is an apocalyptic number.

It is an amenable number.

85641436 is a deficient number, since it is larger than the sum of its proper divisors (72119244).

85641436 is a wasteful number, since it uses less digits than its factorization.

85641436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126884 (or 1126882 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 85641436 is about 9254.2658271740. The cubic root of 85641436 is about 440.7861908184.

It can be divided in two parts, 8564 and 1436, that added together give a 4-th power (10000 = 10⁴).

The spelling of 85641436 in words is "eighty-five million, six hundred forty-one thousand, four hundred thirty-six".