85440006813 has 8 divisors (see below), whose sum is σ = 130194296128. Its totient is φ = 48822861024.

The previous prime is 85440006811. The next prime is 85440006863. The reversal of 85440006813 is 31860004458.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85440006813 - 2¹ = 85440006811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85440006811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034285856 + ... + 2034285897.

It is an arithmetic number, because the mean of its divisors is an integer number (16274287016).

Almost surely, 2^85440006813 is an apocalyptic number.

It is an amenable number.

85440006813 is a deficient number, since it is larger than the sum of its proper divisors (44754289315).

85440006813 is a wasteful number, since it uses less digits than its factorization.

85440006813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068571763.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 85440006813 in words is "eighty-five billion, four hundred forty million, six thousand, eight hundred thirteen".