52043351661 has 32 divisors (see below), whose sum is σ = 88161931520. Its totient is φ = 29723464512.

The previous prime is 52043351651. The next prime is 52043351669. The reversal of 52043351661 is 16615334025.

52043351661 is a `hidden beast` number, since 52 + 0 + 4 + 33 + 516 + 61 = 666.

It is not a de Polignac number, because 52043351661 - 2²⁶ = 51976242797 is a prime.

It is a super-2 number, since 2×52043351661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52043351669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294111 + ... + 436563.

It is an arithmetic number, because the mean of its divisors is an integer number (2755060360).

Almost surely, 2^52043351661 is an apocalyptic number.

It is an amenable number.

52043351661 is a deficient number, since it is larger than the sum of its proper divisors (36118579859).

52043351661 is a wasteful number, since it uses less digits than its factorization.

52043351661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144402 (or 144396 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 52043351661 its reverse (16615334025), we get a palindrome (68658685686).

The spelling of 52043351661 in words is "fifty-two billion, forty-three million, three hundred fifty-one thousand, six hundred sixty-one".