85438347425 has 12 divisors (see below), whose sum is σ = 108806891196. Its totient is φ = 66503361600.

The previous prime is 85438347409. The next prime is 85438347437. The reversal of 85438347425 is 52474383458.

It can be written as a sum of positive squares in 6 ways, for example, as 461433361 + 84976914064 = 21481^2 + 291508^2 .

It is not a de Polignac number, because 85438347425 - 2⁴ = 85438347409 is a prime.

It is a super-2 number, since 2×85438347425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46181966 + ... + 46183815.

It is an arithmetic number, because the mean of its divisors is an integer number (9067240933).

Almost surely, 2^85438347425 is an apocalyptic number.

It is an amenable number.

85438347425 is a deficient number, since it is larger than the sum of its proper divisors (23368543771).

85438347425 is a wasteful number, since it uses less digits than its factorization.

85438347425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92365828 (or 92365823 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 53.

The spelling of 85438347425 in words is "eighty-five billion, four hundred thirty-eight million, three hundred forty-seven thousand, four hundred twenty-five".