51124457645 has 4 divisors (see below), whose sum is σ = 61349349180. Its totient is φ = 40899566112.

The previous prime is 51124457641. The next prime is 51124457749. The reversal of 51124457645 is 54675442115.

51124457645 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 14682411241 + 36442046404 = 121171^2 + 190898^2 .

It is a cyclic number.

It is not a de Polignac number, because 51124457645 - 2² = 51124457641 is a prime.

It is a super-3 number, since 3×51124457645³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51124457596 and 51124457605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51124457641) 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, 5112445760 + ... + 5112445769.

It is an arithmetic number, because the mean of its divisors is an integer number (15337337295).

Almost surely, 2^51124457645 is an apocalyptic number.

It is an amenable number.

51124457645 is a deficient number, since it is larger than the sum of its proper divisors (10224891535).

51124457645 is a wasteful number, since it uses less digits than its factorization.

51124457645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10224891534.

The product of its digits is 672000, while the sum is 44.

The spelling of 51124457645 in words is "fifty-one billion, one hundred twenty-four million, four hundred fifty-seven thousand, six hundred forty-five".