85392538521 has 4 divisors (see below), whose sum is σ = 113856718032. Its totient is φ = 56928359012.

The previous prime is 85392538519. The next prime is 85392538529. The reversal of 85392538521 is 12583529358.

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 85392538521 - 2¹ = 85392538519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85392538529) 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, 14232089751 + ... + 14232089756.

It is an arithmetic number, because the mean of its divisors is an integer number (28464179508).

Almost surely, 2^85392538521 is an apocalyptic number.

It is an amenable number.

85392538521 is a deficient number, since it is larger than the sum of its proper divisors (28464179511).

85392538521 is a wasteful number, since it uses less digits than its factorization.

85392538521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28464179510.

The product of its digits is 2592000, while the sum is 51.

The spelling of 85392538521 in words is "eighty-five billion, three hundred ninety-two million, five hundred thirty-eight thousand, five hundred twenty-one".