53517720416653 has 4 divisors (see below), whose sum is σ = 55363159051740. Its totient is φ = 51672281781568.

The previous prime is 53517720416623. The next prime is 53517720416687. The reversal of 53517720416653 is 35661402771535.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21143691543529 + 32374028873124 = 4598227^2 + 5689818^2 .

It is a cyclic number.

It is not a de Polignac number, because 53517720416653 - 2²¹ = 53517718319501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53517720416594 and 53517720416603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53517720416623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922719317500 + ... + 922719317557.

It is an arithmetic number, because the mean of its divisors is an integer number (13840789762935).

Almost surely, 2^{53517720416653} is an apocalyptic number.

It is an amenable number.

53517720416653 is a deficient number, since it is larger than the sum of its proper divisors (1845438635087).

53517720416653 is a wasteful number, since it uses less digits than its factorization.

53517720416653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845438635086.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 53517720416653 in words is "fifty-three trillion, five hundred seventeen billion, seven hundred twenty million, four hundred sixteen thousand, six hundred fifty-three".