53115721088509 has 8 divisors (see below), whose sum is σ = 56492373369600. Its totient is φ = 49767090818496.

The previous prime is 53115721088473. The next prime is 53115721088519. The reversal of 53115721088509 is 90588012751135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53115721088509 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 53115721088509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53115721088519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7005498859 + ... + 7005506440.

It is an arithmetic number, because the mean of its divisors is an integer number (7061546671200).

Almost surely, 2^{53115721088509} is an apocalyptic number.

It is an amenable number.

53115721088509 is a deficient number, since it is larger than the sum of its proper divisors (3376652281091).

53115721088509 is a wasteful number, since it uses less digits than its factorization.

53115721088509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011005539.

The product of its (nonzero) digits is 3024000, while the sum is 55.

The spelling of 53115721088509 in words is "fifty-three trillion, one hundred fifteen billion, seven hundred twenty-one million, eighty-eight thousand, five hundred nine".