51320505601 has 4 divisors (see below), whose sum is σ = 51327227952. Its totient is φ = 51313783252.

The previous prime is 51320505589. The next prime is 51320505619. The reversal of 51320505601 is 10650502315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51320505601 - 2⁷ = 51320505473 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 51320505601.

It is not an unprimeable number, because it can be changed into a prime (51320005601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3349711 + ... + 3364996.

It is an arithmetic number, because the mean of its divisors is an integer number (12831806988).

Almost surely, 2^51320505601 is an apocalyptic number.

It is an amenable number.

51320505601 is a deficient number, since it is larger than the sum of its proper divisors (6722351).

51320505601 is an equidigital number, since it uses as much as digits as its factorization.

51320505601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722350.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 51320505601 in words is "fifty-one billion, three hundred twenty million, five hundred five thousand, six hundred one".