85663643449 has 8 divisors (see below), whose sum is σ = 85893930720. Its totient is φ = 85433458656.

The previous prime is 85663643413. The next prime is 85663643491. The reversal of 85663643449 is 94434636658.

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 85663643449 - 2¹³ = 85663635257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85663643393 and 85663643402.

It is not an unprimeable number, because it can be changed into a prime (85663643249) 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, 1826754 + ... + 1873060.

It is an arithmetic number, because the mean of its divisors is an integer number (10736741340).

Almost surely, 2^85663643449 is an apocalyptic number.

It is an amenable number.

85663643449 is a deficient number, since it is larger than the sum of its proper divisors (230287271).

85663643449 is a wasteful number, since it uses less digits than its factorization.

85663643449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51239.

The product of its digits is 44789760, while the sum is 58.

The spelling of 85663643449 in words is "eighty-five billion, six hundred sixty-three million, six hundred forty-three thousand, four hundred forty-nine".