52687640653 has 8 divisors (see below), whose sum is σ = 52885595768. Its totient is φ = 52489741824.

The previous prime is 52687640651. The next prime is 52687640659. The reversal of 52687640653 is 35604678625.

It can be written as a sum of positive squares in 4 ways, for example, as 17762758729 + 34924881924 = 133277^2 + 186882^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 52687640653 - 2¹ = 52687640651 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 52687640653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52687640651) 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, 3303025 + ... + 3318937.

It is an arithmetic number, because the mean of its divisors is an integer number (6610699471).

Almost surely, 2^52687640653 is an apocalyptic number.

It is an amenable number.

52687640653 is a deficient number, since it is larger than the sum of its proper divisors (197955115).

52687640653 is a wasteful number, since it uses less digits than its factorization.

52687640653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28143.

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 52687640653 in words is "fifty-two billion, six hundred eighty-seven million, six hundred forty thousand, six hundred fifty-three".