85397143858 has 32 divisors (see below), whose sum is σ = 140256148032. Its totient is φ = 38755368000.

The previous prime is 85397143841. The next prime is 85397143859. The reversal of 85397143858 is 85834179358.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a junction number, because it is equal to n+sod(n) for n = 85397143796 and 85397143805.

It is not an unprimeable number, because it can be changed into a prime (85397143859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6342033 + ... + 6355483.

It is an arithmetic number, because the mean of its divisors is an integer number (4383004626).

Almost surely, 2^85397143858 is an apocalyptic number.

85397143858 is a deficient number, since it is larger than the sum of its proper divisors (54859004174).

85397143858 is a wasteful number, since it uses less digits than its factorization.

85397143858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17530.

The product of its digits is 29030400, while the sum is 61.

The spelling of 85397143858 in words is "eighty-five billion, three hundred ninety-seven million, one hundred forty-three thousand, eight hundred fifty-eight".