85128135090 has 16 divisors (see below), whose sum is σ = 204307524288. Its totient is φ = 22700836016.

The previous prime is 85128135013. The next prime is 85128135091. The reversal of 85128135090 is 9053182158.

It is a Curzon 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, 1418802222 + ... + 1418802281.

It is an arithmetic number, because the mean of its divisors is an integer number (12769220268).

Almost surely, 2^85128135090 is an apocalyptic number.

85128135090 is an abundant number, since it is smaller than the sum of its proper divisors (119179389198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85128135090 is a wasteful number, since it uses less digits than its factorization.

85128135090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837604513.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 85128135090 in words is "eighty-five billion, one hundred twenty-eight million, one hundred thirty-five thousand, ninety".