53112515985 has 96 divisors (see below), whose sum is σ = 95855285760. Its totient is φ = 27182905344.

The previous prime is 53112515969. The next prime is 53112515987. The reversal of 53112515985 is 58951521135.

53112515985 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 2 + 51 + 598 + 5 = 666.

It is not a de Polignac number, because 53112515985 - 2⁴ = 53112515969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53112515985.

It is not an unprimeable number, because it can be changed into a prime (53112515987) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 57793356 + ... + 57794274.

It is an arithmetic number, because the mean of its divisors is an integer number (998492560).

Almost surely, 2^53112515985 is an apocalyptic number.

It is an amenable number.

53112515985 is a deficient number, since it is larger than the sum of its proper divisors (42742769775).

53112515985 is a wasteful number, since it uses less digits than its factorization.

53112515985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1404 counting only the distinct ones).

The product of its digits is 270000, while the sum is 45.

The spelling of 53112515985 in words is "fifty-three billion, one hundred twelve million, five hundred fifteen thousand, nine hundred eighty-five".