51520105045 has 4 divisors (see below), whose sum is σ = 61824126060. Its totient is φ = 41216084032.

The previous prime is 51520105037. The next prime is 51520105051. The reversal of 51520105045 is 54050102515.

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 9265602564 + 42254502481 = 96258^2 + 205559^2 .

It is a cyclic number.

It is not a de Polignac number, because 51520105045 - 2³ = 51520105037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5152010500 + ... + 5152010509.

It is an arithmetic number, because the mean of its divisors is an integer number (15456031515).

Almost surely, 2^51520105045 is an apocalyptic number.

It is an amenable number.

51520105045 is a deficient number, since it is larger than the sum of its proper divisors (10304021015).

51520105045 is a wasteful number, since it uses less digits than its factorization.

51520105045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304021014.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 51520105045 in words is "fifty-one billion, five hundred twenty million, one hundred five thousand, forty-five".