85438257388 has 12 divisors (see below), whose sum is σ = 163109400552. Its totient is φ = 38835571520.

The previous prime is 85438257341. The next prime is 85438257397. The reversal of 85438257388 is 88375283458.

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 3 ways as a sum of consecutive naturals, for example, 970889245 + ... + 970889332.

It is an arithmetic number, because the mean of its divisors is an integer number (13592450046).

Almost surely, 2^85438257388 is an apocalyptic number.

It is an amenable number.

85438257388 is a deficient number, since it is larger than the sum of its proper divisors (77671143164).

85438257388 is a wasteful number, since it uses less digits than its factorization.

85438257388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941778592 (or 1941778590 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 61.

The spelling of 85438257388 in words is "eighty-five billion, four hundred thirty-eight million, two hundred fifty-seven thousand, three hundred eighty-eight".