85128135061 has 8 divisors (see below), whose sum is σ = 85592263680. Its totient is φ = 84664330128.

The previous prime is 85128135013. The next prime is 85128135091. The reversal of 85128135061 is 16053182158.

It is a happy number.

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 85128135061 - 2³³ = 76538200469 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 (85128135091) 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, 456180 + ... + 615106.

It is an arithmetic number, because the mean of its divisors is an integer number (10699032960).

Almost surely, 2^85128135061 is an apocalyptic number.

It is an amenable number.

85128135061 is a deficient number, since it is larger than the sum of its proper divisors (464128619).

85128135061 is a wasteful number, since it uses less digits than its factorization.

85128135061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161843.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 85128135061 in words is "eighty-five billion, one hundred twenty-eight million, one hundred thirty-five thousand, sixty-one".