85644477436 has 48 divisors (see below), whose sum is σ = 179234657280. Its totient is φ = 35011025280.

The previous prime is 85644477431. The next prime is 85644477473. The reversal of 85644477436 is 63477444658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85644477431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45976 + ... + 416416.

It is an arithmetic number, because the mean of its divisors is an integer number (3734055360).

Almost surely, 2^85644477436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85644477436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89617328640).

85644477436 is an abundant number, since it is smaller than the sum of its proper divisors (93590179844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85644477436 is a wasteful number, since it uses less digits than its factorization.

85644477436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370834 (or 370832 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 58.

The spelling of 85644477436 in words is "eighty-five billion, six hundred forty-four million, four hundred seventy-seven thousand, four hundred thirty-six".