85397009540 has 24 divisors (see below), whose sum is σ = 181074828480. Its totient is φ = 33827164128.

The previous prime is 85397009521. The next prime is 85397009587. The reversal of 85397009540 is 4590079358.

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 7 ways as a sum of consecutive naturals, for example, 20725370 + ... + 20729489.

It is an arithmetic number, because the mean of its divisors is an integer number (7544784520).

Almost surely, 2^85397009540 is an apocalyptic number.

It is an amenable number.

85397009540 is an abundant number, since it is smaller than the sum of its proper divisors (95677818940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85397009540 is a wasteful number, since it uses less digits than its factorization.

85397009540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41454971 (or 41454969 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 85397009540 in words is "eighty-five billion, three hundred ninety-seven million, nine thousand, five hundred forty".