85644157543 has 8 divisors (see below), whose sum is σ = 97883440160. Its totient is φ = 73405975680.

The previous prime is 85644157507. The next prime is 85644157559. The reversal of 85644157543 is 34575144658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85644157543 - 2¹³ = 85644149351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85644157583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101118 + ... + 426043.

It is an arithmetic number, because the mean of its divisors is an integer number (12235430020).

Almost surely, 2^85644157543 is an apocalyptic number.

85644157543 is a deficient number, since it is larger than the sum of its proper divisors (12239282617).

85644157543 is a wasteful number, since it uses less digits than its factorization.

85644157543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550377.

The product of its digits is 8064000, while the sum is 52.

The spelling of 85644157543 in words is "eighty-five billion, six hundred forty-four million, one hundred fifty-seven thousand, five hundred forty-three".