51021182745 has 112 divisors (see below), whose sum is σ = 101532687312. Its totient is φ = 24438412800.

The previous prime is 51021182711. The next prime is 51021182753. The reversal of 51021182745 is 54728112015.

It is a happy number.

51021182745 is a `hidden beast` number, since 510 + 2 + 118 + 27 + 4 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 7224320016 + 43796862729 = 84996^2 + 209277^2 .

It is not a de Polignac number, because 51021182745 - 2¹⁰ = 51021181721 is a prime.

It is a super-2 number, since 2×51021182745² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 1738695 + ... + 1767795.

It is an arithmetic number, because the mean of its divisors is an integer number (906541851).

Almost surely, 2^51021182745 is an apocalyptic number.

It is an amenable number.

51021182745 is a deficient number, since it is larger than the sum of its proper divisors (50511504567).

51021182745 is a wasteful number, since it uses less digits than its factorization.

51021182745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29174 (or 29159 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 51021182745 in words is "fifty-one billion, twenty-one million, one hundred eighty-two thousand, seven hundred forty-five".