85657761 has 12 divisors (see below), whose sum is σ = 141403392. Its totient is φ = 48947256.

The previous prime is 85657753. The next prime is 85657799. The reversal of 85657761 is 16775658.

It is not a de Polignac number, because 85657761 - 2³ = 85657753 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (85657711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679761 + ... + 679886.

It is an arithmetic number, because the mean of its divisors is an integer number (11783616).

Almost surely, 2^85657761 is an apocalyptic number.

It is an amenable number.

85657761 is a deficient number, since it is larger than the sum of its proper divisors (55745631).

85657761 is a wasteful number, since it uses less digits than its factorization.

85657761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359660 (or 1359657 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 85657761 is about 9255.1478108132. The cubic root of 85657761 is about 440.8141966441.

The spelling of 85657761 in words is "eighty-five million, six hundred fifty-seven thousand, seven hundred sixty-one".