85644143256 has 32 divisors (see below), whose sum is σ = 244697552640. Its totient is φ = 24469755168.

The previous prime is 85644143239. The next prime is 85644143257. The reversal of 85644143256 is 65234144658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85644143257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254893116 + ... + 254893451.

It is an arithmetic number, because the mean of its divisors is an integer number (7646798520).

Almost surely, 2^85644143256 is an apocalyptic number.

It is an amenable number.

85644143256 is an abundant number, since it is smaller than the sum of its proper divisors (159053409384).

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

85644143256 is a wasteful number, since it uses less digits than its factorization.

85644143256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509786583 (or 509786579 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 48.

The spelling of 85644143256 in words is "eighty-five billion, six hundred forty-four million, one hundred forty-three thousand, two hundred fifty-six".