85161765 has 16 divisors (see below), whose sum is σ = 146740608. Its totient is φ = 41925696.

The previous prime is 85161761. The next prime is 85161773. The reversal of 85161765 is 56716158.

It is not a de Polignac number, because 85161765 - 2² = 85161761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85161761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218169 + ... + 218558.

It is an arithmetic number, because the mean of its divisors is an integer number (9171288).

Almost surely, 2^85161765 is an apocalyptic number.

It is an amenable number.

85161765 is a deficient number, since it is larger than the sum of its proper divisors (61578843).

85161765 is a wasteful number, since it uses less digits than its factorization.

85161765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436748.

The product of its digits is 50400, while the sum is 39.

The square root of 85161765 is about 9228.3132261535. The cubic root of 85161765 is about 439.9617132664.

The spelling of 85161765 in words is "eighty-five million, one hundred sixty-one thousand, seven hundred sixty-five".