51648208897 has 4 divisors (see below), whose sum is σ = 51764796720. Its totient is φ = 51531621076.

The previous prime is 51648208873. The next prime is 51648208919. The reversal of 51648208897 is 79880284615.

It is a happy number.

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 51648208897 - 2¹¹ = 51648206849 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51648208837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58293247 + ... + 58294132.

It is an arithmetic number, because the mean of its divisors is an integer number (12941199180).

Almost surely, 2^51648208897 is an apocalyptic number.

It is an amenable number.

51648208897 is a deficient number, since it is larger than the sum of its proper divisors (116587823).

51648208897 is a wasteful number, since it uses less digits than its factorization.

51648208897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116587822.

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 51648208897 in words is "fifty-one billion, six hundred forty-eight million, two hundred eight thousand, eight hundred ninety-seven".