85688055641 has 2 divisors, whose sum is σ = 85688055642. Its totient is φ = 85688055640.

The previous prime is 85688055623. The next prime is 85688055709. The reversal of 85688055641 is 14655088658.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85649875600 + 38180041 = 292660^2 + 6179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85688055641 is a prime.

It is a super-2 number, since 2×85688055641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85688055611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42844027820 + 42844027821.

It is an arithmetic number, because the mean of its divisors is an integer number (42844027821).

Almost surely, 2^85688055641 is an apocalyptic number.

It is an amenable number.

85688055641 is a deficient number, since it is larger than the sum of its proper divisors (1).

85688055641 is an equidigital number, since it uses as much as digits as its factorization.

85688055641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216000, while the sum is 56.

The spelling of 85688055641 in words is "eighty-five billion, six hundred eighty-eight million, fifty-five thousand, six hundred forty-one".