85505636 has 6 divisors (see below), whose sum is σ = 149634870. Its totient is φ = 42752816.

The previous prime is 85505633. The next prime is 85505639. The reversal of 85505636 is 63650558.

It is an interprime number because it is at equal distance from previous prime (85505633) and next prime (85505639).

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 40883236 = 6680^2 + 6394^2 .

It is a super-2 number, since 2×85505636² = 14622427575528992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85505636.

It is not an unprimeable number, because it can be changed into a prime (85505633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688201 + ... + 10688208.

It is an arithmetic number, because the mean of its divisors is an integer number (24939145).

Almost surely, 2^85505636 is an apocalyptic number.

It is an amenable number.

85505636 is a deficient number, since it is larger than the sum of its proper divisors (64129234).

85505636 is a wasteful number, since it uses less digits than its factorization.

85505636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376413 (or 21376411 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 85505636 is about 9246.9257594078. The cubic root of 85505636 is about 440.5530854651.

The spelling of 85505636 in words is "eighty-five million, five hundred five thousand, six hundred thirty-six".