85424831493 has 4 divisors (see below), whose sum is σ = 113899775328. Its totient is φ = 56949887660.

The previous prime is 85424831449. The next prime is 85424831501. The reversal of 85424831493 is 39413842458.

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 85424831493 - 2⁸ = 85424831237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85424831693) 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, 14237471913 + ... + 14237471918.

It is an arithmetic number, because the mean of its divisors is an integer number (28474943832).

Almost surely, 2^85424831493 is an apocalyptic number.

It is an amenable number.

85424831493 is a deficient number, since it is larger than the sum of its proper divisors (28474943835).

85424831493 is a wasteful number, since it uses less digits than its factorization.

85424831493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28474943834.

The product of its digits is 3317760, while the sum is 51.

The spelling of 85424831493 in words is "eighty-five billion, four hundred twenty-four million, eight hundred thirty-one thousand, four hundred ninety-three".