51232566655 has 8 divisors (see below), whose sum is σ = 61481145600. Its totient is φ = 40984676256.

The previous prime is 51232566617. The next prime is 51232566667. The reversal of 51232566655 is 55666523215.

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 51232566655 - 2³¹ = 49085083007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8866 + ... + 320224.

It is an arithmetic number, because the mean of its divisors is an integer number (7685143200).

Almost surely, 2^51232566655 is an apocalyptic number.

51232566655 is a deficient number, since it is larger than the sum of its proper divisors (10248578945).

51232566655 is a wasteful number, since it uses less digits than its factorization.

51232566655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344273.

The product of its digits is 1620000, while the sum is 46.

The spelling of 51232566655 in words is "fifty-one billion, two hundred thirty-two million, five hundred sixty-six thousand, six hundred fifty-five".