53673661693 has 4 divisors (see below), whose sum is σ = 54205084188. Its totient is φ = 53142239200.

The previous prime is 53673661637. The next prime is 53673661753. The reversal of 53673661693 is 39616637635.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39616637635 = 5 ⋅7923327527.

It can be written as a sum of positive squares in 2 ways, for example, as 35599010329 + 18074651364 = 188677^2 + 134442^2 .

It is a cyclic number.

It is not a de Polignac number, because 53673661693 - 2¹⁷ = 53673530621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53673691693) 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, 265711096 + ... + 265711297.

It is an arithmetic number, because the mean of its divisors is an integer number (13551271047).

Almost surely, 2^53673661693 is an apocalyptic number.

It is an amenable number.

53673661693 is a deficient number, since it is larger than the sum of its proper divisors (531422495).

53673661693 is a wasteful number, since it uses less digits than its factorization.

53673661693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531422494.

The product of its digits is 11022480, while the sum is 55.

The spelling of 53673661693 in words is "fifty-three billion, six hundred seventy-three million, six hundred sixty-one thousand, six hundred ninety-three".