85648043641 has 4 divisors (see below), whose sum is σ = 86610381300. Its totient is φ = 84685705984.

The previous prime is 85648043599. The next prime is 85648043653. The reversal of 85648043641 is 14634084658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33554546041 + 52093497600 = 183179^2 + 228240^2 .

It is a cyclic number.

It is not a de Polignac number, because 85648043641 - 2²¹ = 85645946489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85648043941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481168696 + ... + 481168873.

It is an arithmetic number, because the mean of its divisors is an integer number (21652595325).

Almost surely, 2^85648043641 is an apocalyptic number.

It is an amenable number.

85648043641 is a deficient number, since it is larger than the sum of its proper divisors (962337659).

85648043641 is an equidigital number, since it uses as much as digits as its factorization.

85648043641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962337658.

The product of its (nonzero) digits is 2211840, while the sum is 49.

The spelling of 85648043641 in words is "eighty-five billion, six hundred forty-eight million, forty-three thousand, six hundred forty-one".