85505761 has 4 divisors (see below), whose sum is σ = 93279024. Its totient is φ = 77732500.

The previous prime is 85505753. The next prime is 85505773. The reversal of 85505761 is 16750558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85505761 - 2³ = 85505753 is a prime.

It is a super-2 number, since 2×85505761² = 14622470328378242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85505761.

It is not an unprimeable number, because it can be changed into a prime (85505741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886615 + ... + 3886636.

It is an arithmetic number, because the mean of its divisors is an integer number (23319756).

Almost surely, 2^85505761 is an apocalyptic number.

It is an amenable number.

85505761 is a deficient number, since it is larger than the sum of its proper divisors (7773263).

85505761 is a wasteful number, since it uses less digits than its factorization.

85505761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773262.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 85505761 is about 9246.9325184085. The cubic root of 85505761 is about 440.5533001454.

The spelling of 85505761 in words is "eighty-five million, five hundred five thousand, seven hundred sixty-one".