85551086909 has 8 divisors (see below), whose sum is σ = 90590283000. Its totient is φ = 80512644096.

The previous prime is 85551086897. The next prime is 85551086939. The reversal of 85551086909 is 90968015558.

It can be written as a sum of positive squares in 4 ways, for example, as 31751676100 + 53799410809 = 178190^2 + 231947^2 .

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

It is not a de Polignac number, because 85551086909 - 2³² = 81256119613 is a prime.

It is a super-2 number, since 2×85551086909² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85551086939) 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, 54467 + ... + 417215.

It is an arithmetic number, because the mean of its divisors is an integer number (11323785375).

Almost surely, 2^85551086909 is an apocalyptic number.

It is an amenable number.

85551086909 is a deficient number, since it is larger than the sum of its proper divisors (5039196091).

85551086909 is a wasteful number, since it uses less digits than its factorization.

85551086909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376639.

The product of its (nonzero) digits is 3888000, while the sum is 56.

The spelling of 85551086909 in words is "eighty-five billion, five hundred fifty-one million, eighty-six thousand, nine hundred nine".