85539247924 has 18 divisors (see below), whose sum is σ = 162094345350. Its totient is φ = 39479652576.

The previous prime is 85539247921. The next prime is 85539247943. The reversal of 85539247924 is 42974293558.

It can be written as a sum of positive squares in 3 ways, for example, as 1167588900 + 84371659024 = 34170^2 + 290468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85539247921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63267999 + ... + 63269350.

Almost surely, 2^85539247924 is an apocalyptic number.

It is an amenable number.

85539247924 is a deficient number, since it is larger than the sum of its proper divisors (76555097426).

85539247924 is a wasteful number, since it uses less digits than its factorization.

85539247924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126537379 (or 126537364 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 58.

The spelling of 85539247924 in words is "eighty-five billion, five hundred thirty-nine million, two hundred forty-seven thousand, nine hundred twenty-four".