85591166368 has 24 divisors (see below), whose sum is σ = 168559614468. Its totient is φ = 42782375424.

The previous prime is 85591166359. The next prime is 85591166387. The reversal of 85591166368 is 86366119558.

It can be written as a sum of positive squares in 2 ways, for example, as 60699162384 + 24892003984 = 246372^2 + 157772^2 .

It is a super-2 number, since 2×85591166368² (a number of 23 digits) contains 22 as substring.

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, 307021 + ... + 515212.

Almost surely, 2^85591166368 is an apocalyptic number.

It is an amenable number.

85591166368 is a deficient number, since it is larger than the sum of its proper divisors (82968448100).

85591166368 is a wasteful number, since it uses less digits than its factorization.

85591166368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825496 (or 825488 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 58.

The spelling of 85591166368 in words is "eighty-five billion, five hundred ninety-one million, one hundred sixty-six thousand, three hundred sixty-eight".