53665856635 has 4 divisors (see below), whose sum is σ = 64399027968. Its totient is φ = 42932685304.

The previous prime is 53665856579. The next prime is 53665856659.

It is a happy number.

53665856635 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 53665856635 - 2¹³ = 53665848443 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 53665856635.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5366585659 + ... + 5366585668.

It is an arithmetic number, because the mean of its divisors is an integer number (16099756992).

Almost surely, 2^53665856635 is an apocalyptic number.

53665856635 is a deficient number, since it is larger than the sum of its proper divisors (10733171333).

53665856635 is a wasteful number, since it uses less digits than its factorization.

53665856635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10733171332.

The product of its digits is 58320000, while the sum is 58.

The spelling of 53665856635 in words is "fifty-three billion, six hundred sixty-five million, eight hundred fifty-six thousand, six hundred thirty-five".