51919568101 has 4 divisors (see below), whose sum is σ = 51930253804. Its totient is φ = 51908882400.

The previous prime is 51919568081. The next prime is 51919568123. The reversal of 51919568101 is 10186591915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36075304225 + 15844263876 = 189935^2 + 125874^2 .

It is a cyclic number.

It is not a de Polignac number, because 51919568101 - 2²⁹ = 51382697189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51919560101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5335560 + ... + 5345281.

It is an arithmetic number, because the mean of its divisors is an integer number (12982563451).

Almost surely, 2^51919568101 is an apocalyptic number.

It is an amenable number.

51919568101 is a deficient number, since it is larger than the sum of its proper divisors (10685703).

51919568101 is a wasteful number, since it uses less digits than its factorization.

51919568101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685702.

The product of its (nonzero) digits is 97200, while the sum is 46.

The spelling of 51919568101 in words is "fifty-one billion, nine hundred nineteen million, five hundred sixty-eight thousand, one hundred one".