85511745 has 24 divisors (see below), whose sum is σ = 161695872. Its totient is φ = 41460000.

The previous prime is 85511743. The next prime is 85511747. The reversal of 85511745 is 54711558.

It is an interprime number because it is at equal distance from previous prime (85511743) and next prime (85511747).

It is not a de Polignac number, because 85511745 - 2¹ = 85511743 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85511743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85881 + ... + 86870.

It is an arithmetic number, because the mean of its divisors is an integer number (6737328).

Almost surely, 2^85511745 is an apocalyptic number.

It is an amenable number.

85511745 is a deficient number, since it is larger than the sum of its proper divisors (76184127).

85511745 is a wasteful number, since it uses less digits than its factorization.

85511745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172773 (or 172770 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 85511745 is about 9247.2560795081. The cubic root of 85511745 is about 440.5635770726.

It can be divided in two parts, 8551 and 1745, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 85511745 in words is "eighty-five million, five hundred eleven thousand, seven hundred forty-five".