51333604561 has 8 divisors (see below), whose sum is σ = 52262280000. Its totient is φ = 50407740240.

The previous prime is 51333604541. The next prime is 51333604589. The reversal of 51333604561 is 16540633315.

It is a happy number.

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 51333604561 - 2¹¹ = 51333602513 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 51333604561.

It is not an unprimeable number, because it can be changed into a prime (51333604501) 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, 665911 + ... + 738988.

It is an arithmetic number, because the mean of its divisors is an integer number (6532785000).

Almost surely, 2^51333604561 is an apocalyptic number.

It is an amenable number.

51333604561 is a deficient number, since it is larger than the sum of its proper divisors (928675439).

51333604561 is a wasteful number, since it uses less digits than its factorization.

51333604561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405559.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 51333604561 in words is "fifty-one billion, three hundred thirty-three million, six hundred four thousand, five hundred sixty-one".