51624343513 has 4 divisors (see below), whose sum is σ = 54661069620. Its totient is φ = 48587617408.

The previous prime is 51624343481. The next prime is 51624343523. The reversal of 51624343513 is 31534342615.

51624343513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 17723064384 + 33901279129 = 133128^2 + 184123^2 .

It is a cyclic number.

It is not a de Polignac number, because 51624343513 - 2⁵ = 51624343481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51624343523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518363028 + ... + 1518363061.

It is an arithmetic number, because the mean of its divisors is an integer number (13665267405).

Almost surely, 2^51624343513 is an apocalyptic number.

It is an amenable number.

51624343513 is a deficient number, since it is larger than the sum of its proper divisors (3036726107).

51624343513 is a wasteful number, since it uses less digits than its factorization.

51624343513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036726106.

The product of its digits is 129600, while the sum is 37.

The spelling of 51624343513 in words is "fifty-one billion, six hundred twenty-four million, three hundred forty-three thousand, five hundred thirteen".