85642618885 has 16 divisors (see below), whose sum is σ = 103887331776. Its totient is φ = 67773506688.

The previous prime is 85642618871. The next prime is 85642618889. The reversal of 85642618885 is 58881624658.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85642618885 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 (85642618889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27039 + ... + 414748.

It is an arithmetic number, because the mean of its divisors is an integer number (6492958236).

Almost surely, 2^85642618885 is an apocalyptic number.

It is an amenable number.

85642618885 is a deficient number, since it is larger than the sum of its proper divisors (18244712891).

85642618885 is a wasteful number, since it uses less digits than its factorization.

85642618885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442212.

The product of its digits is 29491200, while the sum is 61.

The spelling of 85642618885 in words is "eighty-five billion, six hundred forty-two million, six hundred eighteen thousand, eight hundred eighty-five".