85651665603 has 32 divisors (see below), whose sum is σ = 136253131776. Its totient is φ = 46794620928.

The previous prime is 85651665571. The next prime is 85651665611. The reversal of 85651665603 is 30656615658.

It is a happy number.

It is not a de Polignac number, because 85651665603 - 2⁵ = 85651665571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85651665683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1058851 + ... + 1136867.

It is an arithmetic number, because the mean of its divisors is an integer number (4257910368).

Almost surely, 2^85651665603 is an apocalyptic number.

85651665603 is a deficient number, since it is larger than the sum of its proper divisors (50601466173).

85651665603 is a wasteful number, since it uses less digits than its factorization.

85651665603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80323.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 85651665603 in words is "eighty-five billion, six hundred fifty-one million, six hundred sixty-five thousand, six hundred three".