85397143857 has 32 divisors (see below), whose sum is σ = 115320741120. Its totient is φ = 56208664320.

The previous prime is 85397143841. The next prime is 85397143859. The reversal of 85397143857 is 75834179358.

It is a happy number.

It is not a de Polignac number, because 85397143857 - 2⁴ = 85397143841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85397143857.

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 31 ways as a sum of consecutive naturals, for example, 51165819 + ... + 51167487.

It is an arithmetic number, because the mean of its divisors is an integer number (3603773160).

Almost surely, 2^85397143857 is an apocalyptic number.

It is an amenable number.

85397143857 is a deficient number, since it is larger than the sum of its proper divisors (29923597263).

85397143857 is a wasteful number, since it uses less digits than its factorization.

85397143857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its digits is 25401600, while the sum is 60.

The spelling of 85397143857 in words is "eighty-five billion, three hundred ninety-seven million, one hundred forty-three thousand, eight hundred fifty-seven".