51621732566452 has 12 divisors (see below), whose sum is σ = 92042523161316. Its totient is φ = 25323868806080.

The previous prime is 51621732566441. The next prime is 51621732566473. The reversal of 51621732566452 is 25466523712615.

51621732566452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14959845897616 + 36661886668836 = 3867796^2 + 6054906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51621732566393 and 51621732566402.

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, 121749369049 + ... + 121749369472.

It is an arithmetic number, because the mean of its divisors is an integer number (7670210263443).

Almost surely, 2^{51621732566452} is an apocalyptic number.

It is an amenable number.

51621732566452 is a deficient number, since it is larger than the sum of its proper divisors (40420790594864).

51621732566452 is a wasteful number, since it uses less digits than its factorization.

51621732566452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243498738578 (or 243498738576 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 55.

The spelling of 51621732566452 in words is "fifty-one trillion, six hundred twenty-one billion, seven hundred thirty-two million, five hundred sixty-six thousand, four hundred fifty-two".