85040421511 has 4 divisors (see below), whose sum is σ = 85077253800. Its totient is φ = 85003589224.

The previous prime is 85040421509. The next prime is 85040421517. The reversal of 85040421511 is 11512404058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85040421511 - 2¹ = 85040421509 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 (85040421517) 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, 18412681 + ... + 18417298.

It is an arithmetic number, because the mean of its divisors is an integer number (21269313450).

Almost surely, 2^85040421511 is an apocalyptic number.

85040421511 is a deficient number, since it is larger than the sum of its proper divisors (36832289).

85040421511 is a wasteful number, since it uses less digits than its factorization.

85040421511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36832288.

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 85040421511 its reverse (11512404058), we get a palindrome (96552825569).

The spelling of 85040421511 in words is "eighty-five billion, forty million, four hundred twenty-one thousand, five hundred eleven".