85640801 has 4 divisors (see below), whose sum is σ = 87092400. Its totient is φ = 84189204.

The previous prime is 85640783. The next prime is 85640813. The reversal of 85640801 is 10804658.

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 85640801 - 2¹⁰ = 85639777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85640861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725711 + ... + 725828.

It is an arithmetic number, because the mean of its divisors is an integer number (21773100).

Almost surely, 2^85640801 is an apocalyptic number.

It is an amenable number.

85640801 is a deficient number, since it is larger than the sum of its proper divisors (1451599).

85640801 is a wasteful number, since it uses less digits than its factorization.

85640801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451598.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 85640801 is about 9254.2315186081. The cubic root of 85640801 is about 440.7851013928.

The spelling of 85640801 in words is "eighty-five million, six hundred forty thousand, eight hundred one".