85809502578 has 16 divisors (see below), whose sum is σ = 171626374080. Its totient is φ = 28601939376.

The previous prime is 85809502547. The next prime is 85809502579. The reversal of 85809502578 is 87520590858.

It is not an unprimeable number, because it can be changed into a prime (85809502579) 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, 149433 + ... + 440396.

It is an arithmetic number, because the mean of its divisors is an integer number (10726648380).

Almost surely, 2^85809502578 is an apocalyptic number.

85809502578 is an abundant number, since it is smaller than the sum of its proper divisors (85816871502).

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

85809502578 is a wasteful number, since it uses less digits than its factorization.

85809502578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614081.

The product of its (nonzero) digits is 8064000, while the sum is 57.

The spelling of 85809502578 in words is "eighty-five billion, eight hundred nine million, five hundred two thousand, five hundred seventy-eight".