53517043687 has 4 divisors (see below), whose sum is σ = 53525513880. Its totient is φ = 53508573496.

The previous prime is 53517043669. The next prime is 53517043703. The reversal of 53517043687 is 78634071535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53517043687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53517043687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53517043487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4225612 + ... + 4238257.

It is an arithmetic number, because the mean of its divisors is an integer number (13381378470).

Almost surely, 2^53517043687 is an apocalyptic number.

53517043687 is a deficient number, since it is larger than the sum of its proper divisors (8470193).

53517043687 is an equidigital number, since it uses as much as digits as its factorization.

53517043687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470192.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 53517043687 in words is "fifty-three billion, five hundred seventeen million, forty-three thousand, six hundred eighty-seven".