85181637 has 8 divisors (see below), whose sum is σ = 113881504. Its totient is φ = 56634768.

The previous prime is 85181587. The next prime is 85181639. The reversal of 85181637 is 73618158.

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

It is not a de Polignac number, because 85181637 - 2¹⁴ = 85165253 is a prime.

It is a super-2 number, since 2×85181637² = 14511822563999538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85181595 and 85181604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181639) 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, 36943 + ... + 39180.

It is an arithmetic number, because the mean of its divisors is an integer number (14235188).

Almost surely, 2^85181637 is an apocalyptic number.

It is an amenable number.

85181637 is a deficient number, since it is larger than the sum of its proper divisors (28699867).

85181637 is a wasteful number, since it uses less digits than its factorization.

85181637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76499.

The product of its digits is 40320, while the sum is 39.

The square root of 85181637 is about 9229.3898498221. The cubic root of 85181637 is about 439.9959314362.

The spelling of 85181637 in words is "eighty-five million, one hundred eighty-one thousand, six hundred thirty-seven".