85240557436 has 12 divisors (see below), whose sum is σ = 149174151840. Its totient is φ = 42619371200.

The previous prime is 85240557403. The next prime is 85240557469. The reversal of 85240557436 is 63475504258.

It is an interprime number because it is at equal distance from previous prime (85240557403) and next prime (85240557469).

It is a self number, because there is not a number n which added to its sum of digits gives 85240557436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12525 + ... + 413083.

It is an arithmetic number, because the mean of its divisors is an integer number (12431179320).

Almost surely, 2^85240557436 is an apocalyptic number.

It is an amenable number.

85240557436 is a deficient number, since it is larger than the sum of its proper divisors (63933594404).

85240557436 is a wasteful number, since it uses less digits than its factorization.

85240557436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453764 (or 453762 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 49.

The spelling of 85240557436 in words is "eighty-five billion, two hundred forty million, five hundred fifty-seven thousand, four hundred thirty-six".