85809666526 has 8 divisors (see below), whose sum is σ = 128760167880. Its totient is φ = 42889610568.

The previous prime is 85809666517. The next prime is 85809666533. The reversal of 85809666526 is 62566690858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7604301 + ... + 7615576.

It is an arithmetic number, because the mean of its divisors is an integer number (16095020985).

Almost surely, 2^85809666526 is an apocalyptic number.

85809666526 is a deficient number, since it is larger than the sum of its proper divisors (42950501354).

85809666526 is a wasteful number, since it uses less digits than its factorization.

85809666526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222698.

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 85809666526 in words is "eighty-five billion, eight hundred nine million, six hundred sixty-six thousand, five hundred twenty-six".